Nothing is better for your newborn than a Natural TouchTM. The SoftFlexTM Natural Nurser is designed to make breastfeeding and bottle feeding work better together. It features the new NûbyTM Breast Size Nipple which closely mimics the natural shape, feel, and function of a mother's breast helping to ease the transition from breastfeeding to bottle feeding. Superior anti-colic valves in the base of the nipple help prevent colic, and soft nubs on the surface massage baby's gums. Additionally, this bottle is made from a high grade of Poly Propelene material which is 100% Bisphenol A FREE and is fully interchangeable with the SoftFlexTM Silicone system.