Take a water container you already have and just add one (or more) Katadyn Siphon filters. Simply place the filters in the water of one container, and place another container lower. Then allow water from the top unit to move through the Siphon’s ceramic filter and its hose to feed safe, filtered, life-saving refreshment into the lower receptacle. Super convenient, reliable water collection for camping, relief organizations, or wherever you need to be sure a group has clean, healthy hydration.