Baby Is Comfortably Able To Complete Feedingsnipple Is Designed To Help Vent Bottle To Reduce Air In Feedingsjust 4 Parts For Easy Assembly And Cleaningdesigned To Grow With Baby: Three Flow Rates Are Available. Slow Flow Is Recommended For Newborns And Breastfed Babies, 0 Months+. Medium Flow Is Recommended For Babies 3 Months+. Fast Flow Is Recommended For Babies 6 Months+Bpa-Free Brand - Mama Bear Infant Feeding Wide-Neck Baby Bottle With Slow Flow Nipple, Bpa Free, 9 Oz (Pack Of 3), Baby Is Comfortably Able To Complete Feedings And Nipple Is Designed To Help Vent Bottle To Reduce Air In Feedings