Silicone Nipple Free from Bisphenol-A Phthalates & PVC "Born Free is a Smart Choice for Your Baby" - Dr. Alan GreeneThe Born Free feeding system features: Silicone nipples that are extremely soft for your baby to suckle. A feeding system that is particularly suitable for breast fed babies who are being introduced to bottle feeding. A unique air vent system which helps prevent nipple collapse. The Born Free feeding system that helps reduce the symptoms of colic, gas and spit up.