Icekool 21 Quart (20 Liter) Beer Box Ice Cooler Our coolers are made from virtually indestructible polyethylene All have great ice keeping qualities They are perfect for camping, fishing, boating or just for use in the backyard They can be used for storing food or drink and even as a seat Depending on volume and temperature of ice and the contents of the cooler they will keep ice for up to 9 days