Lambs and kids quickly learn to nurse when using IdealÂ® Red Screw-on Teats. The nipples are made of soft red latex, closely resembling the eweâ€™s teat, and screws easily onto most standard soda bottles. Threading on the cap prevents leakage. A special flutter valve prevents air intake, and the tip of the nipple can be cut off to increase milk flow. Wash with warm, soapy water.