Philips Avent Natural Glass Baby Bottles support your baby s well-being while making feeding feel natural and comfortable. The Natural Response nipple features a unique opening and tip that allows your baby to control the pace of milk flow, releasing milk only when actively drinking, just like during breastfeeding, and stopping during pauses to swallow and breathe. The wide, soft, and flexible nipple mimics the shape and feel of a breast to support a secure latch and make it easier to combine breast and bottle feeding. A no-drip design helps prevent spills, while an anti-colic valve integrated into the nipple reduces air intake and helps minimize colic and discomfort. The ergonomic bottle shape is comfortable for parents to hold and easy for small hands to grasp. The bottle is simple to assemble, fill, and clean. Made from premium, Bpa-free borosilicate glass, the bottle is heat and thermal shock resistant, allowing safe storage in the fridge, warming, washing, and sterilizing.