Rotomolded Insulated Cooler Box OEM/ODM
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Rotomolding cooler box

Built to perform in the toughest conditions, our rotomolded cooler box combines rugged durability with superior insulation. Crafted from food-grade LLDPE and packed with high-density PU foam, it keeps ice for up to 5–7 days. The seamless one-piece design resists impact, heavy loads, and harsh outdoor environments, while practical features like strong latches, sealing gaskets, drain plug, and wheels ensure convenience on the go. With optional add-ons such as dividers, cutting boards, and nets, it adapts to every adventure. Perfect for camping, road trips, fishing, cold chain transport, and emergency use, this cooler is your ultimate high-performance solution for keeping things fresh wherever life takes you.

About Us
Ningbo Nelgreen Outdoor Products Co., Ltd.
Ningbo Nelgreen Outdoor Products Co., Ltd.
Ningbo Nelgreen Outdoor Products Co., Ltd. was established in May 2023 with a registered capital of 3.88 million yuan. Its subsidiaries include Yuyao Longyu Rubber Products Co., Ltd. and Yuyao Ziming Electronics Trading Co., Ltd., a sales center. As a famous China Rotomolded Insulated Cooler Box Suppliers and Rotomolding Cooler Box Factory, located at No.6 Guantong Road, South District, Xiaocao'e Town Industrial Park, Yuyao City, Zhejiang Province, the company covers an area of 10,000 square meters and employs approximately 100 people. The company specializes in plastic mold design, production, and product processing, and is a leading provider of this industry-leading product. Our main products include various seafood coolers, ice buckets, vehicle coolers, roto-molded coolers, and other outdoor equipment and related parts. We also offer OEM and ODM services.
As a professional manufacturer of rotational molding outdoor products, the company takes independent research and development as its core, equipped with multiple shuttle rotational molding machines and polyurethane high-pressure foaming machines and other advanced equipment. The annual production capacity reaches 400,000 rotational molding products, with an annual output value exceeding 150 million yuan. Our main products include refrigerated boxes, vehicle-mounted refrigerated boxes, seafood refrigerated boxes, and various related parts and accessories, specifically designed for fishing, camping, hunting, and seafood transportation. We use imported food-grade LLDPE as raw materials, which are non-toxic, odorless, environmentally friendly, and safe, with stable performance. We have an independent research and development mold factory to support customized production. The inner layer of the insulation box is injected with PU foaming material, which has a strong heat insulation, heat preservation, and shock absorption effect, and the physical insulation performance reaches the industry-leading level. The product can maintain its insulation for 120 hours. It adopts a seamless one-piece molding process and has passed SGS and CE certifications, strictly adhering to FDA and EU standards. From raw material procurement to finished product delivery, the entire process is subject to quality control.
Our R&D team has over 15 years of rich experience in the field of rotational molding products and has applied for 6 product patents. The number of factory employees has exceeded 100. Strict management and quality control have enabled us to take the leading position in the industry. In addition, the experienced sales team can provide customers with a variety of solutions and high-quality services.
Our company's products are mainly targeted at the mid-to-high-end market. With the advantages of high quality and high cost performance, they are popular overseas, including the United States, Canada, Australia, Spain, Mexico, Japan, Southeast Asia and other countries, and have received high praise. Since its establishment, our company has always adhered to the development policy of "Quality builds brand, service wins future", and is committed to becoming the best manufacturer of insulated boxes at home and abroad. We sincerely welcome customers from home and abroad to visit and guide us!
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Rotomolding cooler box Industry knowledge
Key Features of Rotomolded Cooler Boxes
The durability of rotomolded cooler boxes is a result of the unique manufacturing process known as rotational molding. During the production process, plastic material is heated and slowly rotated inside a mold. This results in an even distribution of material, creating a cooler box that is seamless, thick, and extremely tough. Unlike injection or blow-molded coolers, which are prone to weak spots, our rotomolded cooler boxes are built with consistent thickness and no joints, ensuring that no part of the cooler is more vulnerable than another. At Ningbo Nelgreen Outdoor Products Co., Ltd., we use the highest-quality food-grade LLDPE plastic in our cooler boxes. LLDPE plastic offers excellent resistance to cracks, impacts, and UV degradation, making it a highly durable material for outdoor equipment. Our coolers are designed to withstand harsh environmental conditions such as rough handling, extreme temperatures, and exposure to the sun, ensuring that they remain reliable even in the most challenging outdoor settings. We conduct extensive testing on each batch of coolers to confirm that they meet our high standards of strength and durability. We understand that outdoor adventures can be unpredictable, so we focus on providing our customers with coolers that are not only tough but also capable of enduring multiple years of heavy use. Whether you need a cooler for long camping trips, fishing expeditions, or hunting, Ningbo Nelgreen Outdoor Products Co., Ltd. ensures that our products will endure without compromising on performance.

One of the defining characteristics of our rotomolded cooler boxes is their exceptional ability to maintain cold temperatures for extended periods. This feature is particularly important for users who need to keep food, beverages, or seafood cold for long hours, especially during outdoor activities where access to refrigeration is limited. The superior thermal insulation of our cooler boxes is achieved through the use of advanced polyurethane (PU) foaming technology. At Ningbo Nelgreen Outdoor Products Co., Ltd., we inject PU foam into the cooler box during the manufacturing process. This foam layer, combined with the thick walls of the cooler, ensures minimal heat exchange between the inside and outside of the box. As a result, our coolers can retain ice for up to 120 hours, a critical feature for those who need to keep perishables cool for an extended time. In addition to the PU foam, the seamless one-piece design of our cooler boxes further enhances their insulation performance. Without seams or joints, there are fewer points where heat can escape, ensuring that cold air remains trapped inside, maintaining the internal temperature for a longer period. Our commitment to providing the best thermal insulation technology ensures that customers, whether they’re storing seafood for transport or beverages for a weekend camping trip, can rely on Ningbo Nelgreen Outdoor Products Co., Ltd. coolers to preserve the freshness of their goods for as long as possible. This level of thermal insulation is not only beneficial for personal use but is also crucial for industries that require reliable temperature control, such as the seafood transport industry. Our products meet the high standards required for such applications, providing peace of mind for customers who depend on efficient cooling in their daily operations.

Rotomolded cooler boxes are designed to be resilient, which is particularly important for outdoor enthusiasts who often expose their equipment to rough conditions. The robust construction of these coolers, combined with the shock-resistant qualities of the rotomolding process, ensures that they can withstand harsh treatment without breaking down. At Ningbo Nelgreen Outdoor Products Co., Ltd., we understand that our cooler boxes may be subjected to a variety of impacts during outdoor use. Whether being dropped on rocky terrain, knocked over by strong winds, or exposed to heavy use in extreme conditions, our coolers are built to handle the pressure. The rotational molding process creates a solid, uniform product that is resistant to cracking and puncturing, making it far more durable than traditional coolers. The high-density LLDPE plastic we use adds to the overall durability of the cooler box, enabling it to absorb impacts without losing its shape or functionality. Furthermore, the thick layer of PU foam acts as a buffer that helps protect the contents inside the cooler from external shocks, providing added security for fragile items like beverages, food, or sensitive products. This durability also means that Ningbo Nelgreen Outdoor Products Co., Ltd. coolers are ideal for heavy-duty use in industries where equipment needs to endure rigorous handling. Whether you’re using a cooler for off-road adventures, commercial transport, or fieldwork, you can trust that our products will stand up to the challenge without breaking or wearing down over time.

The one-piece seamless design of rotomolded cooler boxes sets them apart from other types of coolers. Unlike coolers that are made from multiple parts and sealed together, our cooler boxes are formed in a single, continuous molding process. This results in a product with no seams, joints, or weak points, which greatly enhances its overall strength and performance. At Ningbo Nelgreen Outdoor Products Co., Ltd., we believe that the seamless design plays a crucial role in ensuring the long-term functionality and reliability of our coolers. By eliminating seams and welds, we significantly reduce the risk of leakage or breakage, which is a common issue with traditional coolers. The absence of seams improves the insulation performance of the cooler, as there are fewer places for cold air to escape. The one-piece molding process also contributes to the coolers’ durability and impact resistance. Because the cooler is constructed in one continuous piece, it is less likely to crack or split under pressure, making it ideal for use in rugged outdoor environments. This feature is particularly valuable for customers who use their coolers for activities such as camping, fishing, or hunting, where the cooler may be exposed to frequent jostling or impact. The seamless design also improves the aesthetic appeal of the cooler, giving it a sleek and modern look. Ningbo Nelgreen Outdoor Products Co., Ltd. is committed to producing coolers that not only perform well but also look great and reflect our dedication to high-quality design.

Customization is a key advantage that sets Ningbo Nelgreen Outdoor Products Co., Ltd. apart in the rotomolded cooler box market. We understand that different customers have different needs, whether it’s a specific size for storage, a custom color to match a brand, or particular design features to enhance the functionality of the cooler. We offer both OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer) services, allowing us to tailor our cooler boxes to meet the unique requirements of our clients. Our R&D team works closely with clients to understand their specific needs, and we leverage our advanced manufacturing capabilities to create custom solutions. From designing coolers with personalized logos or branding to altering features such as handles, drainage systems, and lids, we provide flexibility that ensures our cooler boxes perfectly meet the demands of our customers. We can even modify the insulation thickness or the external features to cater to specialized industrial applications. For customers in the commercial sector, such as those in the food transport, seafood distribution, or recreational industry, Ningbo Nelgreen Outdoor Products Co., Ltd. offers specialized customization that guarantees the cooler’s functionality aligns with the specific operational requirements. Whether it's creating a cooler with a larger capacity for bulk storage or incorporating additional insulation for extended cooling periods, we are able to deliver solutions that provide excellent value and meet industry standards. Our approach to customization ensures that our customers receive the most suitable and practical cooler for their needs, all while maintaining the high standards of quality that Ningbo Nelgreen Outdoor Products Co., Ltd. is known for.
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