Ninja's backpack cooler offers many of the benefits of its wheeled version with an on-the-go design that's perfect for day trips. Made with comfortable, ergonomically designed straps, the portable cooler keeps drinks and food cold and separate. The top compartment holds up to 36 cans or 24 cans on ice. The cold from the ice (or included ice packs) transfers via FrostVault technology to the FrostVault Dry Zone below where foods stay dry and at refrigerator temperatures for up to 10 hours. Zippered access makes it easy