Amazon.com : Wolka Insulated Cooler Backpack Small- Leak 。?Wear-resistant Nylon Surface & Waterproof PU Coating & 8 mm Foam & Leakproof PEVA Liner ?Imported ?20 Hours Retention: Sparter backpack cooler is insulated with thickened 8 mm foam, together with advanced silver PEVA seal to keep beverages cool up to 20 Hours throughout the day for beach picnic, hiking, camping, trip, boating, baseball / golf and work. ?Leak-proof Liner: Our cooler backpack liner adopts high-tech seamless hot pressing process for leak-proof; The zipper is not leakproof, please be careful not to tip over when using it. ?Double Insulated Compartments & Multi-Pockets: Featured two insulated compartments for cooling drinks & dry foods, front big pocket and two side pockets for your snacks, phone, wallet, and other accessories. A bottle opener included for more convenience. ?Water Resistant & Lightweight: Our cooler bags are made of high-density scratch-resistant nylon with extra waterproof PU coating; Lightweight & portable design with padded shoulder straps and back, more comfortable than carrying a heavy big cooler. ?30 Cans Large Capacity: Measures 17\'\'H x 10.5\'\'L x 7.5\"W and can hold up to 30 cans (330ml), roomy enough to pack meals, beers, tall beverages, snacks and other necessities. *Backpack Cooler With the SPARTER Cooler Backpack; a blend of luxury and practicality that’s too stylish to resist!