The Tommee Tippee Natural Start Anti-Colic Baby Bottles have a breast-like shape and soft silicone teat to help your baby have the most natural bottle-feeding experience, with added anti-colic technology to prevent discomfort caused by gas. Natural Latch and Pace Our bottle teats are shaped to encourage a natural latch, reducing air intake and preventing nipple confusion when switching between breast, bottle and back again. The soft silicone teat flexes and stretches like a breast and allows your baby to feed comfortably at their own pace. Anti-Colic Baby Bottles Tommee Tippee Natural Start teats feature an innovative anti-colic valve which reduces air ingestion, helping to reduce the symptoms of colic. Plus, when the screw ring, teat and cap are all secured, your baby bottle is completely mess-free and leakproof, even if its turned upside down or shaken. Self-Sterilising Baby Bottles Tommee Tippee Natural Start baby bottles can be easily self-sterilised in the microwave in just three minutes. This means there is no need to pack a steriliser or extra bottles when you're out and about.