Designed in conjunction with breastfeeding experts Tommee Tippee Closer to Nature Teats encourage baby to switch between breast and bottle with ease. The revolutionary soft, natural feel silicone teat, mimics the natural flex, softness and movement of the mother’s breast as the unique shape assists baby’s natural feeding action through an easy to latch on teat. Featuring a super sensitive anti-colic valve the Tommee Tippe Closer to Nature Teats Slow Flow will enable the switching between breast and bottle to become a more natural process than ever before. Suitable from birth and BPA free. Easivent technology allows air to flow through without being trapped and swallowed by your baby, reducing the incidence of colic. Features a highly sensitive anti colic valve and a soft natural feel silicone teat. The variflow teat allows your baby to control the flow of their milk by simply using their own sucking strength, to get as much or as little milk as they need. BPA free.