Cup-A-Water, 4 Gallon, Poultry Drinker, None Of The Mess Of Conventional Drinkers, Holds Up To 4 Gallons 18 Liters Of Fresh Water, Hinged Lid For Easy Access Filling, Container Can Be Hung Outside Of Containment Fence With Drinking Cups Inside With Birds, Cups Easily Twist Off For Cleaning, Additional Cups May Be Added For Larger Flocks.