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 babyNatural 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