Each expertly designed and uniquely shaped vital baby NURTURE breast like feeding teat, medium flow, 2pc, mimics the natural breastfeeding action this will help to avoid any confusion when combination feeding requires switching between breast and bottle, ensuring a comfortable and effective feed for your baby the vital baby nurture breast like feeding teat has incorporates advanced triple anti-colic valves to reduce air intake the flex zone area around the bottle teat allows the teat to stretch and flex just like mums breast would, which means it is more comforting and natural for baby as little ones do grow so fast, we have designed a range of teats with varying flow rates to keep up with your growing baby we offer: 0m+ slow flow 3m+ medium flow 6m+ fast flow for hygiene and safety reasons, it is recommended that the teats should be replaced at regular intervals baby approved parent recommended Other bottle size and teat flows available.