Philips AVENT SCF563/57 Classic+ 9 Ounce Bottle with Classic+ Slow Flow Nipple promotes the health and comfort of your baby. This BPA-free bottle is proven to reduce colic and fussiness, especially at night. The unique valve integrated into the nipple flexes to allow air into the bottle, preventing vacuum build-up and preventing air from entering your baby's tummy. The valve on the Classic+ nipples also flexes to your baby's feeding rhythm, so milk only flows at your baby's pace to minimize overeating, spitting up, burping, and gas. The extra soft silicone nipple is available in different flow rates for babies of all ages. With few parts rounded, a wide neck, and easy-to-clean surfaces, the bottle is easy to clean thoroughly. Ease of cleaning helps ensure a more hygienic, healthier feeding. The Classic+ feeding bottle is compatible with most Philips AVENT products, making it easier to meet your baby's changing needs. We recommend using the Classic+ bottles only with the Classic+ nipples.