Feed your baby the natural way with the Philips Avent Natural Glass Bottle. Your little one will latch-on with ease with the wide breast-shaped nipple on the 4oz feeder, making breast and bottle feeding seamless. A unique Air Flex vent technology integrated into the nipple helps to reduce colic and discomfort. Meanwhile, the ergonomic shape of the bottle makes it comfortable for moms to hold. Assembly couldn't be simpler with only a few parts and the wide bottle neck makes filling and cleaning easy. This bottle is made of premium quality borosilicate glass, a BPA free material. Heat and thermal shock resistant, it can be safely stored in the fridge, warmed and is easy to wash and sterilize. Works with all nipples and caps from the Natural line.