RuffLand Water HoleRuff Land Water Hole Self Refilling Dog Water Dish Keep your dog hydrated anywhere with the Ruff Land Water Hole. This rugged, roto molded system combines a 1 gallon water reservoir with a built in drinking dish. As your dog drinks, the dish automatically refills using simple vacuum pressureno electronics, no moving parts, just fresh water on demand. Features All in one jug + water dish Holds up to 1 gallon of water Self refilling design keeps water