The wide, breast-shaped teat promotes natural latch-on similar to the breast, making it easy for your baby to combine breast and bottle feeding. Petals inside the teat increase softness and flexibility without teat collapse. Your baby will enjoy a more comfortable and contented feed. Innovative twin valve designed to reduce colic and discomfort by venting air into the bottle and not baby's tummy. This teat is made from silicone - a BPA-free material (Following EU directive 2011/8/EU). We advise using the Natural feeding teats with Natural bottles only.