Our Orthodontic Bottle Nipple Mimics The Shape Of A Mother'S Nipple During Breastfeeding.Designed To Provide The Most Natural Feeding Experience Possible For You And Your Baby.The Teat Mimics The Shape Of A Mother'S Nipple During Breastfeedingmade Of 100% Food Grade Silicone.Bpa, Pvc And Phthalate-Free.Safe In Freezers Microwave And Boiling Wateranti-Colic Vents Allow Your Baby To Drink Continuously Without Gasping For Air Or Drinking Bubblesfully Compatible With All Gen. 3 Bottles (Glass And Silicone) And Storage Containers, Transforming Them Into A Handy Baby Bottle!2Pk Set A Range Of Flow Rates Are Available For Your Growing Babyhaakaa Gen.3 Silicone Orthodontic Bottle Nipple - Teat Attachment Compatible With Baby Bottles (Glass/Silicone)-Medium Flow - 2 Pcs