MosBug Water Nipple Drinker Chicken Feeder Poultry Duck Hen Screw In Style NEW (100Pack) Ideal for broilers, breeders, layers, pullets, ducks and game birds. Manufacturer recommends 3 birds per nipple. Does not require a drip cup. Screw directly into PVC pipe, or use reducing tees with Teflon tape for round PVC pipe. Delrin body, 360 side-action pin.