Thermal backpack - 18 liters, material 100% leak proof The outside of the thermal backpack is made of waterproof oxford fabric, high density, dirt-proof and for durability and easy cleaning. The inner lining is made of eco-friendly PEVA sheet and padded with EPE foam. Keeps the backpack warm and cold for several hours, keeping the food fresh, suitable for fruits, snacks, drinks, etc. VARIOUS BAGS The thermal bag has a wide opening for easy loading and unloading. There are 2 mesh side pockets to store drinks, bottles and even umbrellas. The bag also has a deep front pocket for storing candy, napkins, keys and other small things. SUPER LARGE CAPACITY thermal backpack can hold at least 18-20L. Size 37X26x20cm. This large lunch box is perfect for family/friends meals. It is suitable for many occasions such as business travel, office, car, travel, hiking, camping, picnic, beach, fishing, etc., which can create a wonderful weekend/vacation/family reunion. With bottle opener,portable in the backpack, you do not need to waste time looking for a bottle opener to drink. PORTABLE Finished with padded strap and shoulder straps to offer various transport options. The padded mesh straps and back offer comfort when carrying many items and provide good ventilation. This backpack is perfect for anyone who likes to take a snack or a drink anywhere, whether it's a walk on the beach with the kids or a walk with friends. Made of durable fabric, it features adjustable and comfortable shoulder straps. Available colors: black/grey/blue/camouflage***It is best to use ice in a sealed/sealed location Bag or ice chips. Loose ice is not recommended. *** Package list: 1* Thermal backpack Warning: items other than the backpack are not included. Manual measurement, consider a measurement error of 1 to 3 cm. Due to different monitors and lights, there may be a small color difference.