The Avent Natural Response Airfree Bottle is a product designed to make feeding easier for babies. This bottle features an Airfree venting system that helps reduce air intake during feeding, which can help prevent colic and discomfort in the baby. In addition, its design mimics the natural shape of a mother's breast, making the transition from breastfeeding to bottle-feeding easier. The bottle is made of safe, BPA-free materials and has a slow-flow nipple that adapts to baby's sucking rhythm. In short, the Avent Natural Response Airfree Bottle is a product that offers a more comfortable and safer feeding for babies.