Breast-like design: Our Natural Start baby bottle teats are designed with a breast-like shape and feel to help encourage a natural latch and prevent nipple confusion Perfect flow: Flow rate is as important as teat shape when it comes to bottle acceptance. Natural Start teats come in different flow rates to keep up with your growing baby Natural Start: These feeding bottle teats are compatible with all Tommee Tippee Natural Start baby bottles, the #1 bottle for easily switching between breast, bottle and back again* Built-in anti-colic valve: Tommee Tippee Natural Start teats have an anti-colic valve that's proven to reduce air ingestion* Paced feeding: The soft silicone teat flexes and stretches like a breast so your baby can feed comfortably at their own natural pace Soft & BPA-free: Tommee Tippee Natural Start teats are made from soft, BPA free silicone for added peace of mind