Ideal for camping, on the water, or at the cabin! The Aqua-Sak can be quickly filled through the spigot opening, and when not in use collapses to a minimal 4" square and weighs only 1.8 pounds. The handle features a comfort grip sock for easy carrying, while the integrated spigot has an on/off valve. The Aqua-Sak is constructed of puncture-resistant nylon material and is FDA food approved.