The unique valve on the nipple flexes to your baby's feeding rhythm. Milk will only flow at the pace chosen by your baby to minimize overeating and spit-up, burping and gas. The new Classic+ bottle is designed to prevent leakage whilst feeding, for a truly enjoyable feeding experience. With only 4 parts, a wide bottle neck, and rounded corners, our bottle is easy to clean quickly and thoroughly. Have peace of mind that your bottle is truly clean in no time.