The K&H Duck Waterer was designed from the ground up to help you keep your pens cleaner, drier and safer. It's uniquely designed reservoir tank discourages chickens from perching, and has an easy fill cap. The water cups are specifically shaped for beaks and bills and contain separate filters. The heated model ensures your ducks and other poultry have access to clean drinking water even on the coldest days. The K&H Duck Waterer is MET listed.