- BigBuy Outdoor S2201623 Blue Cold Accumulator, 500 ml, designed to keep food and drinks at the right temperature for longer - Ideal for outdoor activities such as camping, hiking, picnics, and travel - Compact size makes it easy to carry in portable coolers, thermal bags, and backpacks - Made with durable materials that ensure longevity and reusability - Easy to use: simply freeze before use - Compatible with most coolers and leisure and sports refrigeration accessories - Blue color allows for quick identification and universal use on any occasion