The Chicco NaturalFit Advanced Feeding System is engineered to be responsive to the changing feeding styles of babies. Three distinct nipple shapes adapt to the specific needs of growing babies by changing shape as the baby's way of feeding develops. For easy transition between breast and bottle! Stage 1 is designed for developing feeding skills. The angled newborn flow nipple encourages proper neck positioning for newborns, and always stays full of milk, reducing air intake. The soft flexible nipple mimics mother's breast, and flexors at the base of the nipple enhance elasticity. Twin anti-colic valves help prevent air ingestion, gas and spit-up. Happy babies, happier world! With 50+ years of baby expertise, the researchers at Chicco's Happiness Lab collaborate with experts in childhood development to create products that feed the needs of babies and parents. As the world's favourite baby care brand, Chicco takes the happiness of children seriously. Wide, rounded base and soft flexible nipple mimic mother's breast for a natural latch Unique angled nipple with wider rounded base for proper neck positioning Ergonomically designed bottle is easy to hold, and the wider mouth allows for convenient filling and cleaning Twin anti-colic valves prevent air ingestion, gas and spit-up Newborn flow. For new babies' smaller appetite and developing feeding skills. Expanded assortment available online. This product is not available in our stores.