Milk Bar Feeders Milk Bar 1 is a rail-mounted feeding system designed to deliver milk to calves housed in individual pens. Combines convenience of pail and benefits of a teat. Easier to clean than bottles. Unique gravity-flow teat enables calf to nurse in the same way they nurse their mother. Teats are designed to produce more saliva which aids the digestion of milk. Milk Bar 5 is designed for feeding pens with up to 5 calves. Complete with teat(s).