The new bottle helps to make bottle feeding more natural for your baby and you. The nipple 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. Moreover Petals also increase softness and flexibility without nipple collapse. Your baby will enjoy a more comfortable and contented feed. The 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 compatible with the majority of the Philips AVENT range, excluding our Classic bottles. We advise to use the Philips AVENT Natural bottles only with Philips AVENT Natural feeding nipples.