LOKASS Backpack Cooler for 36Liters, Insulated, Leakproof, Black, NylonLOKASS Backpack Cooler for 36Liters, Insulated, Leakproof, Black, NylonFeatures of LOKASS Backpack Cooler for 36Liters, Insulated, Leakproof, Black, Nylon ?Keep Cold up to 20 Hours?This cooler backpack can keep your food and drinks cold or hot for up to 20 hours with our leak-pr..