The Dr. Brown's Anti-Colic Baby Bottle and Sterilizer Bag Bundle includes 4 2oz/60mL anti-colic bottles with preemie nipples and 5 reusable sterilizer bags for cleaning baby items on-the-go. The preemie bottles feature Dr. Brown's slowest nipple flow rate, clinically proven anti-colic vent system to reduce spit-up and gas, and breast-like nipple shape to ease feeding. The bottles preserve nutrients, aid digestion, and provide a vacuum-free experience closest to breastfeeding so babies can feed at their own pace. The BPA-free sterilizer bags steam clean bottles, nipples, pacifiers, teethers and breast pump parts in 90 seconds, eliminating 99.9% of germs. The stand-up bags are reusable up to 30 times each for a total of 150 uses, compact for traveling, and safe for the microwave. Together, these products offer a complete feeding and cleaning solution tailored for babies' delicate needs.