The Natural glass bottle is heat and thermal shock resistant. It can therefore be safely stored in the fridge warmed and is also suitable for sterilization. The wide breast shaped nipple promotes natural latch on similar to the breast making it easy for your baby to combine breast and bottle feeding. Petals inside the nipple increase softness and flexibility without nipple 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. Wide bottle neck makes filling and cleaning easy. Only a few parts for quick and simple assembly.