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. Dr. Brown''s are constructed of polypropylene. BPA-free. Dishwasher safe. Set contains three 8-ounce bottle and two 4-ounce bottle each with a level 1 nipple and five additional level 2 nipples. Newborn and up.