Avent natural newborn flow teat made of silicone bpa free breast shaped teat featuring unique comfort petals for extra soft and flexible teat advanced anti colic system 0m 2 x newborn flow teats 1m 2 x slow flow teats 3m 2 x medium flow teats 3m 2 x variable flow teats 6m 2 x fast flow teats avent natural newborn flow teat fits only the avent natural feeding bottle