Spc. Bingyan Liu, a water treatment specialist with 40th Composite Supply Company, 45th Sustainment Command, explains how the self-packaging unit works on the Water in a Box system during a weeklong field-testing and train-the-trainer exercise on Schofield Barracks, Hawaii, Feb. 9-18. The WiaB is currently being tested in two commands, U.S. Army Pacific and U.S. Army South. (U.S. Army photo by, Staff Sgt. Kyle J. Richardson, USARPAC PAO)