This set of 5 Dr. Brown's Baby Bottles includes three 4oz bottles and two 8oz bottles, perfect for both newborns and growing babies. The bottles are in gently used condition, with only minor signs of previous use, and the size 1 nipples are brand new—they've been washed but never used, ensuring a fresh start for your baby. Dr. Brown’s bottles are designed with a unique vent system to reduce colic, spit-up, burping, and gas, providing a comfortable feeding experience. This set offers a reliable, high-quality feeding solution at a great value!