Dog Water Box, Stainless SteelSpecifications:- Unique self-filling design- Vacuum pressure keeps reservoir full without overflowing- Trapped air pressure in the well forces water to fill up reservoir while your dog drinks- Tip the box back to fill the well and set on level surface to fill the reservoir- Tip the box on its back and the well holds 2 1/2 gallons of water without spilling for easy transportation- 11 x 10 size