UNIQORALE Waterproof Insulated Backpack, Keeps Food Cold for 20 Hours, Built-in 10mm Insulation, Adjustable Air Valve, Outdoor Insulated Packaging,

[Extra Large Capacity] This outdoor cooler pack has a large 20-liter capacity, enough to hold picnic food and drinks for outdoor activities. It can easily accommodate your needs, whether you're going on a family picnic, camping, or outing. [Versatile Design] This cooler bag is designed as a backpack or can be carried by hand, making it easy to carry and suitable for a variety of occasions and needs. The adjustable air valve allows you to more appropriately regulate the temperature. [Long-Term Cold Insulation] Built-in 10mm insulation cotton keeps food and drinks cool for up to 20 hours. The highly efficient insulation keeps food cool during outdoor activities without worrying about food spoilage. Food stays fresh even in the hot summer. [Durable Material] Made of PVC material, the thick, wear-resistant base makes the cold pack durable and adaptable to various outdoor environments. It's easy to handle, even on rough mountain roads or slippery muddy roads. [Important Notes] 1. After using the cooler box, clean and dry it as soon as possible. Storing it damp can cause unpleasant odors and mold. 2. Avoid storing it in direct sunlight or in areas exposed to geothermal heat. 3. Minimize opening and closing times. Frequent opening and closing can increase the temperature inside the cooler and cause it to lose its cooling capacity. 4. It is not a fireproof material, so store it away from fire. 5. Avoid storing sharp objects inside to prevent damage.