Flexible water tanks are an easy way to store small amounts of water for use in drinking water, rain water, and production water applications. Tanks are typically designed in capacities from 25 to 5,000 gallons to provide enough storage capacity for emergency applications, construction sites, and facilities. Can be used for water tanker in truck which is a mulitipurpose fror truck Flexible tanks are built using several different fabrics including those that are food grade approved for drinking water. Fabrics are chosen based on the type of water you are looking to store, your surrounding area (temperatures and storage location), and the length of time required for your storage