Avent classic variable flow teats 3m have been trusted by mothers for 30 years and continues to be the preferred choice of many mums designed for an enjoyable and easy feeding experience it is clinically proven to reduce colic and discomfort product features easy latch on due to the unique valve on the teat clinically proven to significantly reduce fussing unique anti colic system bpa free teat compatible with classic feeding bottle adjust the flow rate for bab