Lister bags were designed for sterilizing and holding enough water for up to 100 people in an encampment. They are hung from a sturdy tripod away from possible contamination sources like trees. After filling with water, some leaking will occur until the canvas is saturated enough to swell the fibers shut. Moisture will continue to evaporate through the side walls providing an evaporative cooling effect on the water. Due to their huge capacity, Lister bags are great for camping and other outdoor events with large groups. They can also be used to disinfect raw water if necessary. Rumor has it that water stored in a Lister bag tends to taste better than water stored in many other kinds of containers — but we can’t confirm that. After use, Lyster bags compress down to 3″ tall for easy carry and storage. Lister Bag Features Material: Heavy-duty cotton duck canvas (olive drab) with sturdy metal rim at top for extra strength and stability Seams: Treated so they don’t leak Size in Use: 22″ dia. x 36″ tall (not including lid) Size Collapsed: 22″ dia. x 3″ tall for easy carry and storage Removable Lid: Keeps debris out of water, includes attached rope for hanging bag from tripod Dispensing: 6 faucets/taps at bottom of bag Support: Hangs from tripod of sturdy poles (not included) Capacity: 36 gallons Weight: Only 10 lbs when empty and dry; 310 lbs total with 36 gallons of water