The NaturalWave® Teat has been specially developed for breastfed babies. The extra soft and flexible peristaltic teat has a wide textured base for easy latch on and encourages baby's wave like tongue movement, so that baby can continue using their natural sucking style and maintain established breastfeeding patterns. This makes it easy to switch from breast to bottle and back again and the teat has been clinically proven to reduce nipple confusion*. The inner vertical ridges make the teat stronger and collapse resistant, whilst the Anti-Colic Air ventilation System reduces the intake of air.  *Reference, ""Clinical research of Pigeon Peristaltic PLUS™"", Moscow, 2013 & Woolridge et al., ""How Breast-Fed Babies Bottle Feed"", Leeds, 2011. Compatible with all Lansinoh® Feeding bottles, either glass or plastic.  Breastfeeding is recommended for at least the first six months of a baby's life. Breastmilk is the ideal food for infants; it is safe, clean and contains antibodies which help protect against many common childhood illnesses.✝ ✝Information from the World Health Organisation: https://www.who.int/health-topics/breastfeeding  Pack contents: 2 x NaturalWave® Fast Flow Teats.  Made in Turkey.