This baby bottle bundle from Dr. Brown's provides everything you need for your baby's feeding needs. It includes a 5 oz anti-colic wide-neck glass baby bottle with a level 1 slow flow nipple designed for 0m+ babies, along with a set of level 3 medium-fast flow nipples designed for 6m+ babies. The anti-colic glass baby bottle features Dr. Brown's clinically proven internal vent system that reduces colic by decreasing spit-up, burping and gas. The vacuum-free feeding experience mimics breastfeeding by allowing a consistent milk flow so baby can feed at their own pace. The bottle helps preserve nutrients and aids digestion. The wide-neck design has a breast-like nipple shape to encourage proper latching. As baby grows, the internal vent can be removed without needing a new bottle. The level 3 nipples provide a medium-fast flow rate suitable for older babies. Made from soft 100% silicone, these nipples also fit Dr. Brown's Options+ wide-neck bottles. The nipple shape encourages proper latching to ease transition between breast and bottle. Together with the anti-colic system, these nipples reduce colic while preserving nutrients. With the ability to transition from slow to medium-fast flow as your baby grows, this bundle contains everything you need for comfortable, colic-free feeding during the first year.