Peach Teats 082036 Pink Threaded Pink, 1 x 6 Natural looking teat known as the next Best thing to the real thing Milk opening on each side of the Nipple prevents leakage and an internal micro-thin valve stops back flow into the bucket The valve never closes in it's relaxed state and cannot be blocked Designed to act like a real cow's teat moving all the time while the calf is suckling