Tommee Tippee Closer To Nature 2x Fast Flow Teat switching between breast and bottle is second nature with closer to nature teats. Designed in conjunction with breastfeeding experts, the new 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 teat encourages your baby’s natural feeding action so that switching between breast and bottle becomes second nature.