Unique Nipple Design: The Natural Response Nipple has a unique opening that releases milk only when the baby actively drinks, allowing babies to feed at their own pace and rhythm, similar to breastfeeding. Anti-Colic Valve: The bottle is equipped with an anti-colic valve designed to reduce the intake of air and prevent discomfort for your baby by keeping air away from their tummy during feeding. Wide, Soft, and Flexible Nipple: The nipple is wide, soft, and flexible, mimicking the shape and feel of a breast to help facilitate a natural latch and comfortable feeding experience for your baby. Ergonomic Bottle Design: The bottle features an ergonomic design that is easy to grip at any angle, providing maximum comfort for both you and your baby during feeding sessions. Material: Made from glass, the bottle is durable and safe for feeding, ensuring that no harmful chemicals leach into your baby's milk. Size: This pack includes one 240ml (8oz) glass feeding bottle. Overall, the Avent Natural Response Glass Feeding Bottle offers a natural, comfortable, and convenient feeding solution for both breastfed and bottle-fed babies, with features designed to reduce colic and provide a comfortable feeding experience.