(Coburn) Replacement nipple fits any style Milk Bar self feeder for calves. Milk Bar nipples discourage gulping, promote maximum salivation, and help prevent cross-sucking, which can expose young animals to bacteria. To install the Milk Bar replacement nipple, pull the new nipple through the hole until it seals. A flathead screw driver helps to ensure a complete seal. Be sure the nipple slit is vertical.