Nobody wants potential contaminants or parasites to dampen your epic expedition into the great outdoors, and what better way to ensure your drinking water’s safe than with the Alter Ego, your personal water filtration duo. The perfect hydration companion for an adventurous individual on a day trip or for the more experienced globetrotter, Alter Ego filters up to 99,9999% of contaminants in the water, everything from chlorine and heavy metals to agricultural run-off and industrial waste. Designed to provide the greatest reduction per contaminant in the target application zone, for every Alter Ego sold, part of the proceeds are donated to One Drop, an organization dedicated to developing sustainable water access programs worldwide.