Make the transition from breastfeeding to bottle feeding smooth and safe. A bottom that is soft and bulb-shaped for ultimate support, flexible top that resembles the mother’s nipple and retains the natural sucking pattern. Anti-Colic valve to allow air flow into the bottle, preventing vacuum build-up, an even flow and reducing of colic. Made for every age with its four different flows, from 100% super soft silicone. Entirely BPA-free.