You never have to be without a source of potable water when you have the waterBOB emergency drinking water storage system. The waterBOB containment system is made of very durable plastic. It can store up to 100 gallons of clean water for drinking, bathing, cooking, and sanitation needs right in your bathtub. Simply place the liner in any bathtub and use the attached sock to fill with water. The waterBOB keeps your water supply clean and fresh for 12 weeks.