Made from soft-touch silicone with a skin like feel for added reassurance and seamless switching from breast to bottle Natural latch: Our bottle nipples are shaped to encourage a natural latch, reducing air intake and preventing nipple confusion when switching between breast, bottle and back again Anti-colic: Tommee Tippee Natural Start nipples feature an innovative anti-colic valve which reduces air ingestion, helping to reduce the symptoms of colic Self-sterilizing: Tommee Tippee Natural Start bottles can be easily self-sterilized in the microwave in just three minutes Pace feeding