The revolutionary new Closer to Nature easi-vent Teat from Tommee Tippee is designed in conjunction with breastfeeding experts, teat mimics the natural flex, movement and softness of a mum"s breast, to make switching between breast and bottle easier than ever before. The unique shape of the Closer to Nature easi-vent teat encourages your baby"s natural feeding action so that switching between breast and bottle becomes second nature.