Abstract: An inexpensive portable liquid supply tank that serves initially as a shipping container and as a solute or solution dispenser and pump unit carried on a person's back by shoulder straps whose upper support effort is transmitted to the tank about a center of gravity designed to be close to the carrier's back on a strain line directed through its volumetric center of gravity as determined by interbraced semi-flexible front and back walls for carrying comfort and with the straps and a liquid eduction tube extending over the shoulders of the carrier while the other ends of the shoulder straps engage the lower corners of the tank. Motion of the tank on the carrier's back maintains wettable powders in solution if any are present.