Lansinoh Naturalwave Rapid Flow Nipple, 2 units

50 years of extensive research has shown that a baby's sucking style consists of 3 fundamental steps. Grasping, peristaltic movement of the tongue (the tongue moves like a wave) and swallowing. It is important to stimulate the peristaltic movement of the tongue, as this encourages the natural development of the oral cavity and jaw. The NaturalWave teats are specifically designed for the baby to mimic the same tongue movement and easily switch between breast and bottle. Features Promotes natural oral development, following the established breastfeeding pattern. Allows baby to easily alternate between breast and bottle AVS™ air ventilation system reduces air swallowing, a potential cause of colic and regurgitation.The AVS® Air Ventilation System reduces air intake and thus the occurrence of gas and the symptoms commonly associated with colic in babies.