rabbitnipples.com 5 Pack Clear Chicken Quail Cup Water Gravity Fed Self Watering 5 Chicken Cup Waterers with 3/8" Barb and Y's Recommended 2 to 3 birds per each cup Great for Chickens, Chicks, Ducks, Turkeys, Quail and game birds. Use with low pressure or gravity systems only Cups fill themselves. The weight of the water in the cup causes the cup to shut off