Clinically proven to help maintain established breastfeeding patterns the innovative design of the lansinoh feeding bottle allows you to easily combine breastfeeding and bottle feeding the lansinoh 160ml bottle features a super soft and flexible 100 silicone teat the teat is designed for easy latch on and effective suction which encourages baby39s wave like tongue movement promoting instinctive sucking action for natural oral development the avstm air ventilation system reduces