Often labeled the "sophisticated" portable water purifier, First Need Trav-L-Pure Water Purifier is simple to use. Just pour water into its container and pump, no dangling hoses or external accessories, it's completely self contained. Each canister has an average rated capacity of 125 gallons and is sealed to prevent contact with contaminants. As durable as it is easy to use, First Need Trav-L-Pure water purifier has been used by UN forces in Somalia and is a favorite of travelers worldwide.