0% BPA (Bisphenol A). This bottles is made from PP (Polypropylene) - a BPA-Free material. This carton is made of recyclable material. CLINICALLY PROVEN: Helps settle your baby especially at night*. Less colic**. Unique anti-colic valve. The two piece anti-colic system consists of the AVENT Teat and adapter ring. The adapter ring is an essential part of the bottle design and must always be used. As your baby feeds, the unique skirt on the AVENT Teat flexes to allow air into the bottle instead of your baby's tummy. Like natural breastfeeding your baby controls the milk flow. Supports breastfeeding. Soft, naturally shaped silicone teat promotes proper latch on and makes it easier to combine breast and bottle feeding. Sleep and nutrition are vital to your baby's health and happiness. Unsettled and irritable behaviour, known as fussing, is by far the most commonly known crying behaviour in babies. Clinical studies show that the AVENT Bottle significantly reduces colic** and fussing*. Fussing is reduced especially at night*. *At 2 weeks of age babies fed with an AVENT Bottle showed less fussing compared to babies fed with another leading bottle. **At 2 weeks of age babies fed with an AVENT Bottle showed less colic compared to babies fed with a conventional bottle. To fit your baby's growing needs. Five different teat flow rates are available. This pack contains three teats with two holes. 0m+. EXTRA SOFT. Newborn. 1 hole. 1m+. EXTRA SOFT. Slow. 2 holes. 3m+. Medium. 3 Holes. 6m+. Fast. 4 holes. 3m+ Thicker Liquids. Variable Flow. 1 slot. THE QUEEN'S AWARD FOR ENTERPRISE: INNOVATION 2005.