Capacity: Up to six bottles (or twelve cans) of a delicious beverage of your choice Convert the Tenba Messenger Bag into a beverage carrier with this waterproof cooler insert. It even includes a stainless-steel Tenba bottle opener with a carabiner attachment. Heat-sealed seams on waterproof insulated interior fabric ensure your drinks stay cool and your bag stays dry. All you have to add is ice. Fits up to six bottles (or twelve cans) of a delicious beverage of your choice.