Muddy Hill Farm Sideways Sipper Horizontal Drinker Nipple - Spring Action, No drip, Side Mount, Poultry Nipple Drinker (2) Horizontal drinking nipples uses a spring and o-ring - cannot drip and leak like vertical nipples Super easy to install with the unique wing like shape. No need for plyers or cramped hands trying to screw them into your container. Drill a 3/8" hole in your plastic container and screw in the Sideways Sipper Horizontal Poultry Drinker Nipple, no Teflon tape or caulk needed (we do suggest you use caulk when installing in a 55 gallon barrel!) Deep cup allows for more water to be presented to the bird when at the Sideways Sipper Horizontal Poultry Drinker Nipple