The silicone baby feeding bottles from Chicco are made from polypropylene and are BPA free. It comes with a silicone Well-Being teat that has an anti-colic valve that prevents the ingestion of air, reducing colic and discomfort after feeding. The soft and elastic teat closely resembles the nipple, and is easily accepted by your baby for an easy switch between bottle and breast feeding. The milk flow rate of the teat suits new-born baby needs and older. The bottle also comes with a protective cap that keeps it clean when not in use.