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 design reduces colic and discomfort by venting air into the bottle and not baby's tummy. The new Philips Avent Natural bottle is made of BPA free material (polypropylene). Due to the unique shape, the bottle is easy to hold and grip in any direction for maximum comfort, even for baby's tiny hands. Wide bottle neck makes filling and cleaning easy. Only a few parts for quick and simple assembly. Helps to make bottle feeding more natural for your baby and you. The teat features an innovative petal design for natural latch on similar to the breast, making it easy for your baby to combine breast and bottle feeding.