Avent classic medium flow teats 3m have been trusted by mothers for 30 years and continues to be the preferred choice of many mums and now range has been improved to provide an even more enjoyable feeding experience the clinically proven anti colic system is now integrated into the nipple making the bottle extra easy to clean and assemble product features 2 pack 3m 3 holes classic medium flow teat easy latch on due to the unique valve on the teat clinically