BPA-Free Clinically proven to significantly reduce fussing Advanced anti-colic system: Innovative twin valve design reduces colic and discomfort by venting air into the bottle and not baby's tummy Interchangeable design works with all Philips AVENT Classic feeding products Dishwasher and microwave safe Philips AVENT SCF683/37 Classic 9 Ounce Bottle with Classic Slow Flow Nipple promotes the health and comfort of your baby. Developed using extensive research and clinical trials, this BPA free bottle is proven to reduce fussiness and colic. The bottle features a two-piece anti-colic system that consists of the Philips AVENT nipple and adapter ring. As your baby feeds, the unique skirt on the nipple flexes to allow air into the bottle, preventing vacuum build up, and not into your baby's tummy. The bottle comes with a Classic Slow Flow Nipple made of extra soft silicone and featuring a dual-hole. The nipple is intended for infants older than 1 month and breastfed babies of all ages. Working with your baby's natural feeding rhythm, the nipple lets your baby control the flow, more like breastfeeding, which can help reduce overeating and spit-up. Like all Classic Philips AVENT bottles, this Classic Feeding Bottle works interchangeably with the entire line of Philips AVENT Classic feeding products, making it easier to meet your growing baby's changing needs.