The H2gO purifier is a handheld 3-oz device that converts a few grains of common salt into a powerful disinfecting solution in seconds. It can treat 1 to 20 liters of water at a time and never needs replacement parts. The purifier is simple to use and free to operate. It is driven by a cell phone battery that can be charged by the integrated solar panel or USB, and is able to treat 300 liters of water per charge. There is an LED flashlight for nighttime operation.