Dr. Brown's® bottles are an excellent choice for your baby. Proven to help maintain vitamins A, C, and E during bottle feeding, these bottles have positive pressure with no vacuum feeding and help reduce colic, spit-up and gas. Constructed of polypropylene. BPA-free. Dishwasher safe. Set contains two 8-ounce bottles and one 4-ounce bottle, each with a level 1 nipple, and three additional level 2 nipples. 0 months +.