Set of 3 MAM Ultivent 9 oz. Bottles - MAM Ultivent™ Bottles Feature: Baby Safe Plastic ·  No Bisphenol-A ·  No Polycarbonate ·  Shatterproof   Silk Touch Silicone Nipples ·   Easy Breast-to-Bottle Transition   Ultivent™ Base ·    Less Air Means Less Colic Designed to be as close to breast-feeding as possible, the Ultivent™ Bottle System features baby safe polypropylene and contains no Bisphenol A (BPA).    The Ultivent™ Bottle System is constructed of safe and environmentally friendly materials, so you can be assured you are giving your baby the best.  Babies prefer the silk-touch ultra soft silicone nipple to all other silicone nipples: featuring orthodontic shape, it assures easy transition from breast-feeding to safe bottle-feeding.  The air-free bottom valve is designed to assure there is less air during feeding which means less colic.  Overall, the MAM bottle-feeding system is designed to provide you assurance that you are doing the very best for your baby