Water was delivered in the trailer shown in the lower right of this image, carried behind a truck or under a helicopter. Delivery was sporadic so the mess section (food) got it first with any remaining water for individual use. Army-purified water tasted of chemicals and carried a large dirt load that settled out over hours. The mess section supplied some water for drinking but most was mixed with Kool-Aid or presweetened iced tea(without ice) to hide the dirt and foul taste. To this day I will not drink either!