Advance Anti-colic Valve:Chicco WellBeing Feeding bottles feature Advanced Anti-colic Valve smartly placed at the base of nipple to maintain proper ventilation inside the bottle. This helps to prevent the ingestion of air and promotes a constant flow of milk, thus, reducing the risk of colic, regurgitation, hiccups, or any discomfort to the baby while bottle-feeding. | Teat made of Soft Hygienic Silicone (Silicone - Mum Effect):Teat (Nipple) of WellBeing bottle is made with extra soft silicone material which gives an exclusive velvety finish to the teat making it extremely pleasant and soothing for the baby while sucking. Tried by babies, recommended by mums. | BPA Free, Safe for Baby:Chicco WellBeing bottles are made with high-quality BPA free polypropylene material to ensure maximum protection and hygiene. Baby’s safety is our priority too. |