Cooler Bag, 8/16/30 Can Soft Sided Small Portable Insulated Cooling Pack, Everyday Lunch Cooler, Leakproof Ice Chest for Beach, Camping, Travel, Picnic20 HOURS OF COOLING: Our cooler bag is made of durable TPU material on the outside and eco friendly PEVA material on the inside, which combines internally and externally to a 5 layer insulated structure to keep food and drinks cold for up to 20 hours IPX5 LEAK PROOF ZIPPER: Unlike ordinary lunch cooler bags, this insulated cooler bag is 100% waterproof and leak proof, since the hot pressing airtight zip design that prevents spills and leaks, ideal for