MAM Easy Start Self-Sterilizing Anti-Colic Medium Flow Bottle is the ideal bottle for 4+ months. At MAM we work with medical experts to anticipate your baby boy's needs from day one. Whether you’re using baby formula or expressed breast milk, MAM bottles will support you every step of the way — the elongated nipple shape feels just like mom so you can easily switch between breastfeeding and bottle feeding. Our 9oz MAM Easy Start Self-Sterilizing Anti-Colic Bottle is the perfect fit for newborns, specially designed to minimize colic symptoms while feeding. The innovative vented base allows for an even drinking flow, helping to reduce colic for 80%* of babies. Each MAM Anti-Colic Bottle is self-sterilizing in three steps, making it easy to feed your baby when you don’t have a bottle sterilizer on hand: fill in the base with 20ml of water, put the nipple on the base and close the bottle. Heat the bottle in the microwave for three minutes and it’s done! The bottle is made from BPS and BPA free materials, and the removable bottom makes clean-up a snap. It comes with 2 MAM Slow Flow Silicone Nipples for babies 0 months and older, accepted by 94% of babies.** Our bottles for babies make perfect registry and baby shower gifts! *Field study, Austria 2011, tested with 73 mothers of colicky babies / Market research, USA 2010, tested with 35 mothers of colicky babies. **Market research 2010-2020, tested with 1,572 babies