Designed in conjunction with breastfeeding experts, the revolutionary new Closer to Nature Slow Flow Teat mimics the natural flex, movement and softness of a mum's breast, making the switch between breast and bottle easier than ever before. The unique shape of the Closer to Nature teat encourages your baby's natural feeding action so that switching between breast and bottle feel like a natural process. Key Features : Unique, easy latch-on teat shape Super-sensitive valve Soft natural feel silicone teat Suitable from birth BPA-free. Only to be used under adult supervision. Make sure a responsible person is present when your baby is feeding. Always read product information carefully before use.