Philips Avent Natural glass bottles for babies support the well-being of your baby so you can take the best care of yourself. The Natural Response nipple with the unique opening and tip lets your baby control the pace of the milk flow, releasing milk only when actively drinking - just like babies do during breastfeeding. When pausing to swallow and breathe, no milk flows. Feeding feels as natural as from the breast! Easily combine breast and bottle feeding with a wide, soft and flexible nipple that mimics the shape and feel of a breast. It helps the baby to latch on and feed comfortably, using its natural rhythm. With the no-drip design, the nipple helps prevent spills and lost milk. An anti-colic valve integrated into the nipple is designed to reduce colic and discomfort by sending air away from your baby's tummy. The ergonomic shape makes it comfortable for parents to hold and easy for small fingers to grasp. Assembly is simple, with only a few parts, while the wide bottleneck makes filling and cleaning easy. Philips Avent Natural glass baby bottles are made of premium quality borosilicate glass, a BPA-free material. They're heat and thermal shock resistant, so they can be safely stored in the fridge, warmed and are easy to wash and sterilize. Use the Philips Avent Natural glass baby bottles with Philips Avent Natural Response bottle nipples. It is totally natural for your baby to take 2-3 tries to get milk flowing from a new bottle. We have 5 different nipple flow rates for the Natural bottle. When looking for the right one, age is a guide, but your baby's approach to drinking and the feeding cues will help determine when to move to a higher or lower nipple flow rate. Suckling is a skill and some babies develop it quicker than others. That’s why some babies might initially benefit from our “First Flow” nipple (Nipple 0) before progressing to the Natural Response nipples. Switch to “First Flow” nipple when your baby takes longer than 20 minutes to drink 50 ml/1.7 oz using the Natural Response nipples. If feeding difficulties persist, consult a healthcare professional. ¹ IQVIA Health ProVoice Survey 2025, USA