Advanced Anti-Colic: These feeding bottle teats are compatible with Tommee Tippee Advanced Anti-Colic baby bottles and works with the vented wand to help reduce feeding discomfort caused by colic, gas and reflux Choice of flow: Flow rate is as important as teat shape when it comes to bottle acceptance. Advanced Anti-Colic bottle teats come in different flow rates to keep up with your growing baby Breast-like design: Our Advanced Anti-Colic teats are designed with a breast-like shape and feel to help encourage a natural latch and prevent nipple confusion Natural pace: Soft silicone flexes and stretches so baby can feed comfortably at their own natural pace from the #1 bottle for helping ease the discomfort of colic, gas and reflux* Soft & BPA-free: Tommee Tippee Advanced Anti-Colic teats are made from soft, BPA free silicone for added peace of mind