Dr. Brown's baby bottle offers various options with two feeding systems and a tested bottle. The latest bottles from Dr. Brown's give parents the choice of how they want to feed their baby. The innovative, patented ventilation system allows for feeding with or without the system. Dr. Brown's options grow with your child's needs and provide you with a healthy benefit. Made from safe and sustainable materials, the bottle is BPA-free and contains no phthalates. The bottle, made from high-quality materials, preserves the natural vitamin content in the food (A, C, E) and reduces the formation, retraction, and swelling of the baby's nipple. It prevents the suction of air and features a wide bottle neck as well as a soft natural silicone nipple.