The unique K&H Duck Waterer gives ducks and other poultry access to drink water while making it impossible for them to play in it. The unique water cups are designed perfectly for beaks and bills. Each cup has a removable filter. Keeps pens drier and cleaner. The reservoir tank is shaped to deter perching when used with chickens and other fowl. Easy fill cap on reservoir tank. Also comes in a heated version. The heated version of the K&H Thermo-Duck Waterer keeps water from freezing and available to ducks and other poultry on the coldest days. MET listed. Two year limited warranty.