Natural latch on. 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.Unique comfort petals. Petals inside the teat increase softness and flexibility without teat collapse. Your baby will enjoy a more comfortable and contented feed. Advanced anti-colic valve. Innovative twin valve design reduces colic and discomfort by venting air into the bottle and not baby’s tummy. Ergonomic shape. 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. Compatibility across the range. The new Philips Avent Natural bottle is compatible with the Philips Avent range, excluding Classic bottles and cup handles. We advise to use the Natural bottles with Natural feeding teats only. This bottle is BPA free*. The new Philips Avent Natural bottle is made of BPA free* material (polypropylene). Different sizes. The Philips Avent Natural bottle is available in 3 sizes: 4oz/125ml, 9oz/260ml and 11oz/330ml. All bottles are available in single and multi packs. Simple to use and clean. Wide bottle neck makes filling and cleaning easy. Only a few parts for quick and simple assembly.