Chicco Well-Being Feeding Bottles are especially designed to provide the baby with a comfortable and relaxed feeding experience. It helps protect your baby from colic, hiccups, regurgitation (spitting-up), and irritability.The anti-colic valve situated at the base of teat (nipple) ensures perfect ventilation inside the bottle. Thus, helps to prevent the ingestion of air, reducing the risk of colic and regurgitation, therefore, enables smooth, relaxed, and continuous feeding