The EXCAL Topper is the most versatile lamb and kid feeding device available. Using the proven EXCAL lamb teat in our ”Topper” cap. This nice solid cap incorporates a ball valve to allow inlet of air. The Topper will fit all standard 28mm o.d. thread plastic ”coke” and soda bottles. The EXCAL Topper is a long-lasting teat, that will rear quite a few lambs without breaking up. And lambs love it. If you wish to speed up the flow for stronger lambs, just extend the tip x-cuts slightly.