Clinically proven to help maintain established breastfeeding patterns the innovative design of the lansinoh feeding bottle allows you to easily combine breastfeeding and bottle feedingfeatures and benefits for lansinoh feeding bottle 240ml with natural wave teatencourages babys wave like tongue movement promoting natural oral developmentwide base bottlesuper soft and flexible 100 silicone teatavstm air ventilation system reduces intake of air to prevent coliccompatibility across the rangebp