Natural Feeding That's Naturally Safe. Premium Material - Ideal for Boiling & Steam Sterilization. BPA Free. Natural milk flow - Baby controls the flow of milk, similar to breastfeeding Naturally fuss free ActiveFlow Venting Technology clinically designed to reduce colic and gas Naturally safe - Free from BPA and PVC Active Flow Venting Technology - Patented, Leak-free Vent System The ideal bottle system for both breastfeeding and formula feeding. Lets baby control milk flow for an experience closer to breastfeeding. Clinically designed to reduce colic and gas. Hassle free - fewer parts to clean and maintain. The Born Free Bottle System is designed to address the feeding needs of all babies-whether they are breastfed, formula fed, or both-making it the natural choice for all mothers. Soft silicone nipple. Easy-grip cap ring. Active Flow Vent - Clinically designed to reduce colic and gas / Patented, leak-free vent allows baby to control flow for an experience closer to breastfeeding. BPA Free / Premium Material - Ideal for sterilization / Bottom rack dishwasher safe. Bottle cover included.