Capacity: The Waterdrop camping water filter straw can provide 1,400 gallons/one straw of safe drinking water. The maximum capacity can be reached 100,000 gallons by backwashing to purifier the straw. 5-stage Filtration: Made from selected filtration materials, the 0.1 um fiber membrane of the gravity water filter straw can reduce most harmful substances in water to ensure the safety of every drop of outdoor drinking water.
