Royal Rooster Chicken Poultry Twin Waterer with Automatic Valve Operated Cup &ndash; 1 Gallon Clean, no-mess water for your chickens or ducks! Minimises evaporation, spillage and dirty water European-made, valve-operated drinker cups. Cups are auto replenished as the water level goes down Easy to fill & clean & no chicken/ duck training required  theyll take to it straight away Hooks straight onto mesh or attach to a wall with brackets. 1 drinker suits 4-6 chickens/ ducks 1 gallon cup style drinker, 20 tall, UV stable, durable PVC plastic, Australian made quality