Capacity:The WaterdrCapacity:The Waterdrop gravity water filter straw system can provide 1,400 gallons/one straw of safe drinking water.opCapacity:The Waterdrop gravity water filter straw system can provide 1,400 gallons/one straw of safe drinking water. gravity water filter straw system can provide 1,400 gallonsCapacity:The Waterdrop gravity water filter straw system can provide 1,400 gallons/one straw of safe drinking water./one straw of safe drinking water.
