Powdered Water - This fine white powder sparkles faintly. An ounce mixed with a single drop of water, becomes a gallow of drinkable water. The powder is usually put in a vessel that can contain the full gallow of water before teh drop of activating liquid is added. The vessel is then shaken to agitate the mixture. It take s afull round for the gallon of water to form. The powder must be kept in a watertight container to remain effective, but it is an easy way to transport large amounts of water over great distances.