Wholesale Ice Chest & Hard Cooler

As a leading manufacturer of hard coolers, KingStar specializes in producing durable, high-performance ice chests and coolers excellent for outdoor use. We offer a range of customizable options to ensure your custom branded cooler boxes meet market demands and branding requirements. With years of industry expertise, we provide top-notch quality at competitive prices, making us a reliable partner for bulk orders.

Durable, long-lasting coolers
Customizable sizes and designs
Ideal for large-scale wholesale distribution

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KingStar’s Hard Sided Coolers & Ice Chests

KingStar: Your Trusted Professional Cooler Box Manufacturer

Diverse Hard Cooler Solutions

With over 50 years of expertise, KingStar Mold delivers a wide selection of hard coolers built for durability, performance, and outdoor use. Our product line covers everything from compact personal coolers to high-capacity models ideal for camping, fishing, tailgating, and commercial use. Each cooler is engineered to retain ice longer, withstand tough environments, and maintain food-safe standards.

Custom OEM & ODM Services

We provide full OEM and ODM support for hard coolers. Our in-house team includes 16+ designers and 20 engineers who develop over 200 new designs annually, many of which are patented. Whether you need unique shapes, custom colors, branding, or packaging—we offer full confidentiality through NDA agreements to protect your design ideas.

High-Capacity Automated Production

KingStar Mold runs 17+ automated production lines with advanced molding and assembly systems. Our hard cooler production capacity reaches 1.8 million units per year, ensuring consistent lead times and scalable volume for wholesale partners across the globe.

Rigorous Quality Assurance

We implement multi-stage quality control to guarantee product consistency. Over 60 QC staff perform inspections during each production phase—from material sourcing to final packaging. Every hard cooler undergoes internal and third-party final inspections for strict compliance with durability and performance standards.

Professional Support Team

Our experienced sales team provides end-to-end service, including pricing, sampling, order tracking, and logistics coordination. With industry knowledge and a responsive approach, we ensure clear communication and 24-hour reply times to support your business at every step.

OEM & ODM Services

KingStar offers comprehensive OEM and ODM services for hard coolers, designed to support brands and businesses with unique market needs. Our team of over 16 industrial designers and 20 mechanical engineers brings deep expertise in mold design, structural engineering, and aesthetic customization. Each year, we develop more than 200 new product concepts and hold over 200 patents—demonstrating our strong commitment to innovation. Whether you need a cooler with a distinct shape, texture, color scheme, or logo placement, we can deliver fully customized solutions from concept to finished product. To ensure your designs remain confidential, we are always ready to sign a non-disclosure agreement (NDA) before collaboration.

Quality Management System

KingStar applies a rigorous, process-driven Quality Management System to ensure every hard cooler meets strict performance and durability standards. Our QC department includes over 60 experienced inspectors who perform multi-stage checks during raw material inspection, in-process monitoring, and final product evaluation. Every cooler undergoes structural integrity testing, insulation efficiency checks, and visual inspection before packaging. Our quality control workflow includes self-inspection by production teams, patrol inspections during manufacturing, and final inspections carried out by a dedicated QC unit associated with the sales office. This multi-layered approach ensures consistent quality, reliable performance, and complete traceability for every product batch.

Your Trusted Wholesale Ice Cooler Manufacturer in China

KingStar specializes in producing high-quality ice coolers tailored for bulk orders and custom branding. With advanced manufacturing capabilities and years of industry experience, we support businesses worldwide with reliable, scalable solutions.

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Features of Our Cooler Boxes

Durable & Travel-Ready

Built with high-strength EPS or LLDPE materials, our hard coolers are designed to endure rugged outdoor use. They offer excellent impact resistance and long-lasting insulation—ideal for transporting chilled food, drinks, and ice packs on any journey.

Superior Ice Retention

Engineered with thick thermal insulation, our coolers maintain cold temperatures for 3 to 8 days when used with ice or cold packs. They can also retain warmth for 3 to 8 days, making them versatile for both hot and cold storage needs.

Wide Capacity Options (5L–80L or Customed)

Available in multiple sizes, from compact 5L models to large 80L coolers, or customed—perfect for camping trips, outdoor events, or job site use. These coolers outperform typical soft cooler bags in insulation and durability.

Ergonomic Carrying Design

Equipped with sturdy side handles and optional foldable handles, our coolers are easy to carry and transport. The design minimizes strain during lifting, even when fully loaded.

Ideal for Any Occasion

Perfect for camping, fishing, road trips, picnics, or as a reliable daily work cooler. Whether you’re outdoors or on the move, our hard coolers deliver dependable performance in any setting.

Main Types of Hard Sided Coolers

1

Standard Ice Chests
General-purpose hard coolers with basic insulation—ideal for day trips, picnics, and casual use. They offer reliable cooling in a lightweight, affordable design.

4

Marine Coolers
Built to withstand sun, salt, and water—marine coolers are UV-resistant and corrosion-proof. Ideal for boats, docks, and fishing trips.

2

High-Performance Rotomolded Coolers
Rotationally molded for durability and exceptional ice retention (up to 5–10 days). Perfect for camping, fishing, and rugged outdoor activities.

5

Personal Coolers / Lunch Box Coolers
Small-sized coolers (5L–15L) for carrying meals or drinks to work, school, or short outings. They are compact, lightweight, and easy to carry, making them ideal for everyday personal use.

3

Wheeled Coolers
Designed for portability, these coolers feature heavy-duty wheels and pull handles. Great for beaches, tailgates, or large events where mobility matters.

6

Specialty Coolers
Includes coolers with added features like cup holders, dry storage trays, or integrated cutting boards—designed for premium or specific-use scenarios.

Where to Use a Portable Ice Box

Parties & Gatherings
Set your portable ice box on the patio or in the backyard to keep beverages like beer, soda, and juice chilled. It’s also great for preserving dips, sauces, and salads throughout the event.

Camping Adventures
Take it to the campsite to store essentials like meat, eggs, and dairy products safely. It’s perfect for keeping drinks cold or even soup warm around the fire.

Picnics & Outdoor Meals
Pair it with your picnic basket to hold items like cheese, bread, desserts, and chilled wine. It’s also handy for keeping hot drinks like coffee warm during cooler days.

On the Road
Keep it in your car for easy access to snacks, sandwiches, fruits, or takeout leftovers. It ensures freshness during long drives or spontaneous food stops.

Sports & Fitness
Bring it along to the gym or sports field for chilled water, energy drinks, and snacks. You can even use it to store cool towels or warm compresses depending on your needs.

Top 5 Benefits of Using Hard Coolers

Long-Lasting Ice Retention

One of the biggest advantages of hard coolers is their superior insulation. Thanks to thick insulated walls and high-quality sealing, hard coolers can keep ice frozen and contents cold for anywhere from 48 to over 200 hours, depending on their build and usage. This makes them ideal for extended outdoor trips, multi-day events, or any situation where refrigeration isn’t available.

Exceptional Durability and Protection

Hard coolers are constructed from tough materials like LLDPE, HDPE, or rotomolded plastic, which gives them outstanding impact resistance. They can handle drops, bumps, and rough handling during transport—whether you’re hiking through the woods, driving off-road, or hauling them on a construction site. Some models can even double as extra seating or steps due to their high weight capacity.

Versatile for a Wide Range of Activities

Hard coolers are highly adaptable and can be used for various purposes such as camping, tailgating, fishing, boating, long road trips, or job site lunches. They’re suitable for both leisure and work environments, capable of storing perishable food, beverages, bait, or even medical supplies that require consistent temperature control.

Secure Storage with Leak-Resistant Design

Many hard coolers come equipped with heavy-duty latches, rubber gaskets, and secure locking options to ensure a tight seal. This not only helps maintain temperature but also keeps dust, insects, or even animals out—an important feature for outdoor and wilderness use. Additionally, the sealed design helps prevent any melted ice or liquid from leaking into your car or tent.

Wide Variety of Sizes and Functional Features

Hard coolers are available in a broad range of capacities, from small personal models (around 5–15L) to large group-size coolers (60–100L+). Many models also offer added features such as wheels for mobility, telescopic handles, built-in cup holders, dry storage trays, bottle openers, or fish rulers—making them more functional and user-friendly for specific use cases.

How to Use Hard Coolers Effectively

1. Line the Interior with Reflective Insulation

To enhance your cooler’s ice retention, line the interior with aluminum foil or thermal bubble wrap. These materials reflect heat and UV rays, minimizing temperature rise inside the cooler. You can even place an extra sheet on top of the cooler for added sun protection.

2. Choose the Right Cooler for Your Trip

For extended outdoor use, always opt for a hard-sided cooler made of durable plastic or rotomolded material. These models offer superior insulation and are more robust than soft coolers, making them ideal for camping, fishing, or multi-day road trips.

3. Pre-Chill the Cooler and Its Contents

Before packing your cooler, pre-chill it by filling it with ice a few hours in advance. Also, freeze or refrigerate food and drinks ahead of time to prevent warm items from melting the ice quickly. Frozen water bottles can double as both ice packs and drinks.

4. Use Ice Blocks Instead of Cubes

Larger ice blocks melt more slowly than small cubes due to reduced surface area exposure. Use molds like milk cartons or plastic containers to create your own blocks—perfect for maximizing cooling duration in hard coolers.

5. Wrap the Cooler in a Damp Towel

Wrap your hard cooler with a light-colored, damp towel and place it in the shade. As the towel evaporates in the breeze, it draws heat away from the cooler, helping to keep internal temperatures lower for longer.

6. Pack and Organize Strategically

Minimize how often and how long the cooler lid is opened. Pack frequently used items near the top or front to avoid unnecessary rummaging. A well-organized hard cooler helps maintain cold air and reduces ice melt.

7. Use Dry Ice Alongside Regular Ice

For longer trips, place dry ice at the bottom of the cooler and layer regular ice on top. Dry ice evaporates into gas, so it doesn’t leave a watery mess, and helps maintain extremely cold temperatures inside the hard cooler.

8. Keep the Cooler in a Cool, Shaded Spot

If you’re outdoors for days, consider partially burying the cooler in cool soil or keeping it under a tree or awning. Hard coolers can handle rough use, and using the natural environment can prolong ice retention.

9. Drain Melted Water Regularly

Standing water inside a cooler speeds up the melting process. Drain the cooler frequently to remove melted ice, keeping the remaining ice solid for a longer time.

Tips for Keeping Ice Longer in Your Ice Chest

1

Prepare Your Icebox
Pre-chill your icebox before packing it with ice and contents. You can do this by placing a bag of ice inside a few hours ahead or storing the empty cooler in a cold environment. Starting with a cold interior helps slow down the initial ice melt. Wipe away any moisture inside before repacking.

5

Add the Beers!
Fill the remaining space in your icebox with drinks like beer or soda, which act as cold thermal mass. The more cold contents inside, the longer your ice will last. Just make sure your beverages are pre-chilled. Keeping your drinks packed tight also reduces warm air pockets.

2

Use Block Ice
Block ice lasts significantly longer than cubed ice because it melts at a slower rate due to reduced surface area. You can make your own by freezing water in containers like milk jugs or Tupperware. Combine it with cubed ice to fill small gaps and improve surface cooling. Position large blocks at the bottom for optimal performance.

6

Keep Out of the Sun
Always place your icebox in a shaded area, away from direct sunlight. UV rays can rapidly heat the cooler’s exterior, reducing insulation efficiency. If shade isn’t available, cover the box with a light-colored towel or reflective blanket. The lower the external temperature, the slower the internal ice melt.

3

Add Salt to Your Ice
Mixing salt with your ice can lower its melting point, keeping your items colder for longer. This method is especially useful if you need to freeze items rather than just chill them. However, be cautious as it will create brine, which can be messy. Use sealed containers or bags to protect food from contact.

7

Avoid Opening Too Often
Every time you open the lid, warm air enters and speeds up the melting process. Plan ahead so you only open your icebox when absolutely necessary. Organize items by priority and frequency of use. Quick access keeps cold air trapped inside.

4

Cool Your Food and Drinks First
Always chill your items in the refrigerator or freezer before putting them in the icebox. Warm or room-temperature contents will cause the ice to melt faster. Pre-cooled items help maintain internal temperature more effectively. This simple step can significantly extend ice retention.

8

Fill Your Icebox as Much as Possible
A full icebox maintains its temperature better than a half-empty one. Air gaps accelerate ice melt because they allow warm air to circulate. If you don’t have enough food or drinks to fill the space, add extra ice or frozen water bottles. Tightly packed contents improve thermal efficiency.

What to Look for When Buying a Hard Cooler

Before investing in a hard cooler, it’s essential to match your choice with how and where you plan to use it. Whether it’s for backyard BBQs, weekend fishing trips, or multi-day camping adventures, choosing the right model with the right features will ensure long-term satisfaction. Here’s what you should consider when shopping for a high-performance hard cooler:

1. Durability of Construction

Hard coolers are built for rough handling and extended outdoor use. Look for models made from rotomolded polyethylene or heavy-duty plastic that can withstand impacts, sun exposure, and heavy loads. Some coolers also meet bear-resistance standards, ideal for remote wilderness use.

2. Ice Retention Performance

Ice retention is one of the most critical factors in hard coolers. The best models can hold ice for 5–10 days or longer, thanks to thick insulation, freezer-grade gaskets, and secure lids. Choose a cooler known for multi-day performance if you’re using it for camping, hunting, or extended travel.

3. Latching and Sealing Mechanisms

A tight-sealing lid is key to maintaining cold temperatures. Hard coolers should feature robust, easy-to-use latches that stay locked even when the cooler is jostled. Avoid cheap plastic latches that can break easily—opt for rubber T-latches or stainless steel mechanisms that hold up over time.

4. Cooler Size and True Capacity

Select a size that suits your needs—whether it’s a compact 25QT model for day trips or a spacious 80L chest for large gatherings. Be aware that advertised capacity may not reflect usable internal volume, especially in rotomolded models with thick walls. Consider both how much it holds and how much space it takes up.

5. Material and Insulation Type

Rotomolded hard coolers are among the most durable and well-insulated, ideal for extreme conditions. Avoid thin plastic models or those with insufficient foam insulation. Polyurethane foam insulation between thick walls provides superior cold retention compared to cheaper EPS foam.

6. Additional Features

High-end hard coolers often come loaded with user-friendly extras. Look for features like:

Built-in bottle openers
Tie-down slots
Cup holders
Non-slip feet
Fish rulers
Drain plugs with sloped channels
Dry storage trays These additions improve usability and functionality during outdoor activities.

7. Portability and Handling

Though hard coolers are heavier than soft ones, smart design can make them easier to move. Consider models with sturdy carry handles, wheels, or side grips. For large-capacity coolers, wheels and heavy-duty handles are a must for transport.

8. Country of Origin and Quality Control

Many hard coolers are manufactured overseas. Ensure the model you choose is made by a reliable factory with strict quality control standards. Brands that manage their own manufacturing process, like KingStar, offer better reliability and customization options.

9. Warranty and Support

A hard cooler is an investment, so warranty coverage matters. Top brands offer warranties ranging from 5 years to lifetime guarantees. KingStar’s OEM coolers, for example, are backed by dependable service and support—ideal for both retail and promotional use.

Other Uses for Hard Coolers Besides Keeping Drinks Cold

Hard coolers are designed for more than just chilling beverages. Thanks to their rugged construction and superior insulation, they serve multiple functions in both outdoor adventures and everyday use. Here are several alternative ways to make the most of your hard cooler:

1. Store Freshly Caught Fish

Hard coolers are ideal for preserving your catch after a long day of fishing. In hot summer weather, they keep fish cool and prevent spoilage. During winter ice fishing, they maintain a stable internal temperature, stopping your catch from freezing solid. The insulation, combined with the residual body heat of the fish, keeps them pliable and easy to clean later.

2. Prevent Food and Drinks from Freezing

In freezing conditions, a high-quality hard cooler can prevent items from becoming rock-solid. Place your food and beverages inside the cooler while ice fishing or winter camping to keep them cold without freezing. The insulation shields contents from direct exposure to sub-zero temperatures, making it easier to enjoy your supplies all weekend long.

3. Keep Live Bait Alive Longer

Using a hard cooler as a bait container is a smart move, especially when bait prices are high. The insulation helps maintain a consistent, cold—but not freezing—environment, which slows the bait’s metabolism and reduces oxygen consumption. This keeps baitfish like shiners and minnows alive and active for longer, cutting down on trips to the bait shop.

4. Retain Heat for Hot Meals

Just as a hard cooler retains cold, it also works in reverse to retain heat. Pre-warmed meals or hot drinks can stay warm for hours when stored in a sealed hard-sided cooler. This is especially useful when transporting food for picnics, tailgates, or outdoor job sites. It’s a convenient way to keep meals piping hot without the need for additional equipment.

5. Use as a Waterproof Storage Box

Thanks to their weatherproof seals and tough shells, hard coolers double as dry storage containers. They’re perfect for storing towels, electronics, clothes, or gear during camping or boating trips. Unlike backpacks or duffel bags, coolers keep water and dust out, protecting your belongings no matter the conditions.

6. Temporary Seat or Table

Hard coolers are sturdy enough to function as makeshift seats or tables. Whether you’re out fishing, camping, or at a tailgate, the flat lid can be used to sit, prep meals, or play a card game. Just make sure the cooler model is designed to support weight safely.

Our Customizing Services

Custom logo

We offer custom logo printing or embossing to help you reinforce your brand identity. Whether it’s for promotional use or retail, your logo can be added with precision and long-lasting durability.

Custom color / graphic / pattern / texture

Choose from a wide range of colors, surface graphics, patterns, and textures to make your hard cooler stand out. We can match specific brand colors or create unique visual effects to align with your design vision.

Custom shape

If you need a non-standard shape for a specific application or brand identity, we can create a fully customized mold. This allows for distinct visual appeal and enhanced functionality tailored to your market.

Custom structure / capacity

We can modify the cooler’s internal structure or overall size to match your usage requirements. From compact personal coolers to large-capacity models, we design for convenience, storage, and portability.

Custom packaging / accessories

We offer branded or retail-ready packaging, as well as a selection of customized accessories such as handles, wheels, bottle openers, or spouts. These add-ons enhance product value and user experience while supporting your branding goals.

Frequently Asked Questions

Are your hard coolers built to handle rough outdoor conditions?webadmin2025-07-07T05:02:54+00:00

Are your hard coolers built to handle rough outdoor conditions?

Absolutely—these hard coolers are built to laugh off rough outdoor conditions. The outer shell’s UV-resistant, so baking in direct sun won’t make it fade or crack, even after years. They’re tough enough to take drops, drags over rocks, or gear stacked on top without denting or warping. Extreme heat? Freezing cold? No problem—they hold their shape and performance.

And here’s a detail that matters for backcountry trips: The thick walls and heavy-duty latches aren’t just for durability—they stand up to curious wildlife too. Whether it’s a curious bear checking things out or other critters, the solid build and tight-sealing design mean they won’t easily pop open.

We’ve spent years refining these coolers, even crafting them to meet the same tough standards as the industry’s top brands. So whether you’re camping deep in the woods, boating through choppy waters, or tailgating in the mud, they’ll keep up. No shortcuts—just the kind of ruggedness that’s made to outlast the adventure.

Do your hard coolers have features to make them easier to carry?webadmin2025-07-07T05:00:30+00:00

Do your hard coolers have features to make them easier to carry?

Absolutely. We design with portability in mind, and it depends on the size: Smaller coolers (20–35 quart) have sturdy side handles for easy lifting. Medium to large ones (45+ quart) often come with heavy-duty rope handles or padded grips, and many 70+ quart models add wheels—perfect for rolling over sand, dirt, or pavement without straining. Some even have a telescoping handle to pull them smoothly. No matter the size, we make sure they’re easy to move, even when full.

Can I use dry ice in your hard coolers?webadmin2025-07-07T04:57:56+00:00

Can I use dry ice in your hard coolers?

Yes! Our hard coolers are dry ice compatible (but not soft coolers). Here’s how:

Use 1–2 lbs of dry ice per 24 hours.
Place it on top of regular ice or wrap it in newspaper to prevent direct contact with food.
Leave the drain plug slightly open to release pressure.

Note: Dry ice can keep items frozen for 1–2 days longer than regular ice .

What is your payment term?webadmin2025-06-30T03:26:23+00:00

What is your payment term?

We offer flexible payment terms and several secure methods for your convenience.

Payment Methods:

Wire Transfer (T/T)
PayPal
Western Union

Payment Terms:

Mold payment: 50% deposit upfront, 40% upon T1 sample approval, and the remaining 10% after final approval.
Product payment: 30% deposit upfront, with the remaining 70% due before product shipment.

If you have specific payment requirements other than those mentioned above, feel free to contact and discuss them with us (via our email: sales@kingstarmold.com, or sending a quote by filling out the table on this contact page). We’re always open to finding a solution that works for both sides.

How long is the sample lead time?webadmin2025-06-30T04:34:30+00:00

How long is the sample lead time?

The lead time for samples can vary depending on your specific project. Here’s a general idea:

Standard parts or existing molds:
If your part matches something we already produce, samples usually take about 3 to 7 days, depending on stock and shipping times.
Custom molded or machined parts:
For new designs that require custom molds or mechanical processing, it usually takes 2 to 5 weeks to produce samples. This period includes the time for mold fabrication, preparatory work, and making minor adjustments according to your requirements.
3D-printed prototypes:
If you need to obtain the prototype product quickly, we also offer 3D printing services in metal or plastic materials. These samples can usually be completed within 3 to 5 days, depending on factors such as size, material, and surface treatment requirements.
Special finishes or testing:
Surface treatments like anodizing, black oxidize, painting, etc.(click here to see our options), or specific functional tests might add a bit more time.

Once we know your part details, we’ll confirm the timeline and keep you posted throughout the process. Feel free to share your drawings or ideas so we can give you a more precise estimate!

Can I get samples for testing?webadmin2025-06-30T04:35:35+00:00

Can I get samples for testing?

Yes, absolutely. At KingStar, we understand how important it is to check the quality and fit of your parts before moving into mass production.

In most cases, we can provide samples in small quantities — usually between 1 and 10 pieces (for 3D printing, CNC machining), or 10 to 100 pieces (for injection molding) depending on your part’s size, complexity, and production method.

We offer several options for making samples:

3D Printing (Metal or Plastic): Great for fast prototypes or design validation, usually ready in just a few days. We usually provide 1-3 pcs as samples.
Trial Runs from Injection Molding: For plastic parts requiring high accuracy or specific materials, we can run small batches (usually 10-100 pcs) using soft or production tooling.
CNC Machining: Ideal for metal or plastic parts needing precise tolerances or certain material properties before committing to tooling. For machining, we usually provide 1-5 pcs as samples.

However, this is not fixed. If you need more samples than we usually provide, we are open to negotiate, and if your project requires special finishes, surface treatments, or functional testing, we’re happy to include those in the sampling process as well.

Let us know your part details, and we’ll advise the best way to produce your samples quickly and cost-effectively.

Can KingStar help me turn an idea into a product?webadmin2025-07-08T07:21:54+00:00

Can KingStar help me turn an idea into a product?

Yes! At KingStar, we specialize in helping customers transform concepts into real, manufacturable products. Our one-stop manufacturing service: help you turn an idea into a product covers every step from design assistance and prototyping to tooling, mass production, and post-processing. Whether you have a sketch, CAD file, or just an idea, our team is ready to guide you through every step of the process efficiently and cost-effectively.

Before I provide my design/drawing/sketch, are you willing to sign a NNN or NDA to protect my intellectual property?webadmin2025-06-30T02:29:16+00:00

Before I provide my design/drawing/sketch, are you willing to sign a NNN or NDA to protect my intellectual property?

Absolutely — protecting our customers’ intellectual property is one of our highest priorities. We fully understand the sensitivity and value of proprietary designs, drawings, or any confidential information you share with us.

We are willing and ready to sign either a standard NDA (Non-Disclosure Agreement) or a more comprehensive NNN Agreement (Non-Disclosure, Non-Use, Non-Circumvention) upon request. If you have your own legal template, you can send it over for our review and signature. Alternatively, we can provide our standard NDA template for your consideration.

Once an NDA or NNN agreement is in place, we guarantee:

Strict confidentiality: All technical data, drawings, specifications, and communications remain strictly confidential and are used only for your project.
Non-use commitment: We will not use your designs or proprietary information for any purpose other than producing your parts or providing requested services.
Non-circumvention: We will not share your contacts, suppliers, or project details with third parties or attempt to bypass you in any commercial dealings.
Secure data handling: We maintain secure systems and protocols to store and manage confidential documents safely.

Our team works with clients from industries like automotive, aerospace, medical devices, consumer products, and many others — all of which require the highest levels of confidentiality and trust.

Please feel free to discuss any specific confidentiality needs with us, and we’ll make sure proper agreements are in place before reviewing your designs.

Can hard coolers be used for both hot and cold storage?webadmin2025-07-07T03:24:56+00:00

Can hard coolers be used for both hot and cold storage?

Yep, our hard coolers are total multitaskers—they’re built to handle both hot and cold storage like a pro.

For cold stuff? They’re absolute champs. Thanks to that high-density, closed-cell polyurethane (PU) foam insulation we use—plus the tight silicone gasket sealing the lid—they lock in cold to keep ice frozen for 3 to 8 days under regular outdoor use. Whether you’re packing cold drinks for a weeklong camping trip, fresh produce for a picnic, or frozen snacks for a tailgate, the rigid shell adds extra protection against outside heat, so your stuff stays frosty far longer than flimsy coolers.

And when it comes to hot storage? They step up just as well. That same insulation doesn’t just trap cold—it locks in heat, too. The sturdy build (no flimsy walls here) and tight seal keep hot drinks like coffee or tea warm (over 140°F/60°C) for 48+ hours, and hot foods like soup or chili heated safely (above 165°F/74°C) for 24+ hours. Perfect for early morning hikes, all-day work sites, or camping meals where you want something warm hours later.

Cheap hard coolers might fizzle out on one or the other, but ours? They’re engineered to excel at both. Need a cooler that keeps things icy and toasty, no matter the adventure? That’s what we build ’em for. Reach out if you want to find the right one for your needs.

How long can a hard cooler keep items cold?webadmin2025-07-07T03:30:38+00:00

How long can a hard cooler keep items cold?

How long a hard cooler keeps items cold boils down to one big thing: quality.

Cheap, low-quality hard coolers? They’re usually made with thin, flimsy foam insulation and loose lids that let cold seep out fast. Even in mild conditions, they might keep things cool for 12 hours at most—if you’re lucky. Leave them in direct sun or open the lid a few times? That cold could fizzle out in half that time.

Our high-quality hard coolers? It’s a whole different story. We build them with thick, high-density polyurethane foam insulation and tight-sealing silicone gaskets that lock cold in and block heat out. That means they’ll keep items cold for 3 to 8 days—but exactly how long depends on how you use them and the environment. Hot, sunny days or frequent lid openings will shorten it; keeping the cooler in shade and limiting how often you open it? It’ll stretch that cold retention even longer.

Want to squeeze every last hour of cold out of your cooler? Our guide, How to Pack a Cooler for Maximum Ice Retention, breaks down pro tips for packing—like layering ice, pre-chilling the cooler, and organizing items to minimize heat loss. It’s a game-changer for getting the most out of your cooler, no matter the adventure.

At the end of the day, it’s simple: cut corners on quality, and you’re stuck with a cooler that quits after 12 hours. Invest in a well-built one? You’ll keep things icy for days. That’s the difference we build into every cooler we make.

Is it easy to clean the coolers?webadmin2025-07-07T04:36:06+00:00

Is it easy to clean the coolers?

Yes, cleaning hard coolers is generally straightforward, thanks to their durable construction and smooth interior surfaces. Here’s why they’re easy to maintain:

• Smooth, Non-Porous Surfaces:
Hard coolers, especially high-quality models, typically feature smooth, non-porous interiors that make it easy to wipe off dirt, food residue, or spilled liquids. This prevents bacteria and mold from accumulating, which is crucial for hygienic storage.

• Drainage Plug for Easy Water Removal:
Most hard coolers come equipped with a drainage plug at the bottom, allowing you to easily empty out any melted ice or excess water without tipping the cooler over. This feature helps in the cleaning process and prevents water from stagnating inside.

• Removable Trays or Baskets:
Some models have removable trays or baskets that can be cleaned separately, which makes it easier to keep the inside of the cooler free from debris and odors. These removable parts can be wiped or washed, ensuring your cooler remains clean and functional.

• Simple Cleaning Solutions:
To clean your cooler, you typically need mild soap and warm water. For tough stains or odors, a mixture of baking soda and water can be used to scrub the interior. If the cooler has an odor, a simple solution is to leave it open in a well-ventilated area after cleaning.

• Regular Rinsing and Maintenance:
With regular rinsing and the occasional deeper cleaning, hard coolers can remain in excellent condition for years. Some users may choose to use specialized cooler cleaning products, but basic cleaning tools and products work just fine.

If you need specific steps or instructions, we have a post that specifically explains how to clean your cooler. You can refer to it.

What is the advantage of a cooler box?webadmin2025-04-07T05:49:56+00:00

What is the advantage of a cooler box?

A cooler box—especially a high-quality hard cooler—offers a wide range of benefits for both recreational and professional use. Whether you’re camping, fishing, tailgating, or transporting temperature-sensitive goods, here are the main advantages:

• Superior Temperature Retention:
Hard cooler boxes are built with thick insulated walls, often filled with high-density polyurethane (PU) foam. This insulation traps cold air inside and blocks external heat, keeping ice solid and contents cold for days—even in extreme temperatures.

• Durability and Impact Resistance:
Unlike soft coolers, hard-sided cooler boxes are made from rugged materials like rotomolded polyethylene, which resists cracking, denting, and UV damage. This makes them ideal for tough environments like camping trips, fishing boats, or construction sites.

• Versatile Storage Options:
Cooler boxes can store not only beverages and food but also fish, bait, medical supplies, or any other temperature-sensitive items. Some models even offer dry storage compartments, cutting boards, cup holders, and built-in bottle openers for added convenience.

• Can Keep Items Hot or Cold:
Thanks to their excellent insulation, cooler boxes can maintain both hot and cold temperatures. This means you can use the same cooler to keep soup or cooked meals warm for hours, depending on your needs.

• Portable and Easy to Clean:
Despite their solid construction, most hard coolers come with carry handles, wheels, or tie-down slots for easy transportation. Their smooth inner surfaces also make them easy to rinse out and sanitize after use.

• Waterproof and Leak-Resistant:
A well-sealed hard cooler prevents leaks and keeps water out, making it a reliable dry storage container in wet or unpredictable environments. Many models include a drainage plug for easy water removal without tipping the cooler over.

• Long-Term Value:
With proper care, a quality cooler box can last for many years. It’s a smart investment for anyone who regularly needs reliable thermal performance and durability in demanding settings.

Whether you’re spending a day at the beach or transporting food to remote job sites, a hard cooler box offers unbeatable functionality, protection, and performance.

Are the materials used in hard coolers food-safe and BPA-free?webadmin2025-07-07T04:47:22+00:00

Are the materials used in hard coolers food-safe and BPA-free?

Absolutely. All materials in our hard coolers—from the outer shell to the inner liner—are food-safe and 100% BPA-free. We use food-grade plastics and certified insulation that meet global safety standards, so you can store drinks, snacks, or meals without worrying about harmful chemicals leaching in. Your food stays safe, and you stay confident.

What sizes do your hard coolers come in, and how do I choose the right capacity for my needs?webadmin2025-07-07T04:55:29+00:00

What sizes do your hard coolers come in, and how do I choose the right capacity for my needs?

Our hard coolers come in a bunch of sizes to fit different needs—from small enough for a solo trip to big enough for a whole group. Here’s the gist:

Common sizes (and when to use ’em)

20–35 Quart: Good for 1–3 people on day trips. Toss in drinks, snacks, and a little ice, and you’re set for a picnic or short hike.
45–60 Quart: Perfect for families (3–5 people) or weekend getaways. Holds enough food, drinks, and ice for 2–3 days of camping or a beach trip.
70–100 Quart: Great for longer trips (3+ days) or bigger groups (6+ people). Think multi-day camping, fishing, or group outings where you need supplies for days.
100+ Quart: Heavy-duty—for big gatherings, commercial use, or expeditions. Holds tons of food/ice for 5+ days.

How to pick?

Just think about your group size and trip length. 1–3 people out for a day? 20–35 quart works. 3–5 people camping over the weekend? 45–60 quart is better.

Need exact measurements? Specifics like height, width, and capacity details are on each product page—check the specs tab, it’s all there.

And if you need a custom size? We can do that too. Just hit up our sales team(sales@kingstarmold.com) and let ’em know what you’re after.

Easy enough, right? Let us know if you want help narrowing it down!

How Does a Hard Cooler Work?webadmin2025-07-07T04:44:53+00:00

How Does a Hard Cooler Work?

A hard cooler works by creating a super-insulated, tightly sealed space that slows down how heat moves in and out. That’s why it keeps stuff cold for so long—even when it’s hot outside. Let’s break down how it all comes together:

First off, the walls are key. The shell (usually tough plastic) isn’t just for looks—inside, there’s thick insulation. Top-quality coolers use dense polyurethane foam here, which is way better at blocking heat than the thin, cheap foam in basic models. Rotomolded coolers are extra good because their walls are seamless and packed with this thick foam, so outside heat has a hard time sneaking in.

Then there’s the lid seal. A good hard cooler has a rubber gasket (like the kind in your fridge) around the lid. When you shut it, that gasket squishes tight, making an airtight seal. No warm air gets in, no cold air escapes—that’s a big part of why the cold stays trapped.

The latches matter too. They’re not just to keep the lid closed—they press that gasket even tighter. Whether it’s a T-latch or a cam latch, the idea is to lock in that seal, so heat can’t wiggle through gaps.

Here’s the thing: A cooler doesn’t make cold—it holds onto it. You start with ice or ice packs, and the cooler preserves that cold. Block ice works better than cubes, by the way—less surface area means it melts slower, so it keeps things cold longer.

The materials help too. The outer shell is made of stuff that doesn’t let heat pass through easily, and the inside is usually smooth and light-colored, which reflects heat instead of soaking it up. Together with the insulation, that keeps the whole thing resistant to warmth.

Most have a drain plug at the bottom, too. When ice melts, you can drain the water without opening the lid (which lets heat in). Less water means less heat transfer, so the remaining ice lasts longer.

There are extra little features that help, too: Rubber feet lift the cooler off hot ground (like pavement or sand), so it doesn’t soak up heat from below. UV-resistant shells keep the outside from absorbing sunlight (which would warm things up). Even the lid has insulation—since heat rises, that extra layer stops warmth from seeping in through the top.

Curious about how similar containers (like cooler boxes or ice chests) work? We break it down in more detail in our post: How Does a Cooler Box / Ice Chest Work?

Bottom line: A hard cooler is basically a cold-trapping box. It uses thick insulation, tight seals, and smart materials to hold onto the cold you start with. The better those parts work, the longer your ice stays solid—and your drinks stay cold. That’s the difference a well-made cooler makes.