Wholesale Ice Chest & Hard Cooler
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.
Features of Our Cooler Boxes
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.
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Marine Coolers
Built to withstand sun, salt, and water—marine coolers are UV-resistant and corrosion-proof. Ideal for boats, docks, and fishing trips.
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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.
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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.
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Wheeled Coolers
Designed for portability, these coolers feature heavy-duty wheels and pull handles. Great for beaches, tailgates, or large events where mobility matters.
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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
How to Use Hard Coolers Effectively
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.
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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.
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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.
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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.
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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.
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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.
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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.
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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:
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Built-in bottle openers
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Tie-down slots
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Cup holders
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Non-slip feet
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Fish rulers
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Drain plugs with sloped channels
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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
Frequently Asked Questions
Yes, absolutely. At KingStar Mold, we understand how important confidentiality is when it comes to your unique product designs. We are fully willing to sign a Non-Disclosure Agreement (NDA) before reviewing your sketches or design files. Your intellectual property will always be treated with strict confidentiality and handled securely throughout the entire project.
At KingStar Mold, we typically provide samples within 2–3 weeks after confirming the design and receiving all necessary specifications. For mass production, the standard lead time ranges from 4 to 6 weeks, depending on the complexity of the mold and part, as well as order quantity. We prioritize timely delivery and will always communicate clearly if any delays are expected.
