Chicken nipples are valves which dispense a drip of water whenever they are pecked.. Nipple style waterer had been typically used by professional chicken farmers for many years due to many outstanding reasons. No more poop in water. No spilling and soaking the nesting material so the chickens can get nature gravity fed by fresh, clean water without diseases. More and more backyard chicken farmers come to agree to freely DIY or home made their own nipple waterer system by their chicken numbers. Because it is easy and quick to build. Save money and save time of looking after chickens. Even leave town for the weekend without worrying about the flock. Drill a 3/8" hole in 3/4" PVC pipe and snap nipple on. Can be taken off to be cleaned if necessary. 10 Pack