* Slow Flow * BPA Free * With Natural Wave Nipple * Clinically Proven to Help Maintain Established Breastfeeding Patterns * AVS - Air Ventilation System Reduces Intake of Gas, A Potential Cause of Colic or Spit Up * 8.4 oz/250 ml Bottle Capacity * Interchangeable System Grows with Your Baby * Dishwasher and Microwave Safe Based on over 50 years of extensive research on feeding babies. The sucking style of babies involves 3 steps: 1. Latching on - Baby"s lips open outward and latch onto the areola 2. Peristaltic "wave like" tongue movement - Baby"s motion to compress nipple and extract milk 3. Swallowing - Back of baby"s tongue rises, channeling the milk into the esophagus The patented NaturalWave Peristaltic Nipple was designed to mimic this natural feeding pattern Nipple Tip * Baby controls milk flow * Perfect shape for baby"s mouth 100% Silicone * Super soft and flexible, designed for optimal compression * Long lasting clear material Inner vertical grooves * Strengthen the structure of the nipple; making it collapse-resistant Clinically Proven * Reduces nipple preference in established breastfed babies Hole Size * Available in slow, medium and fast flows to meet baby"s changing needs Unique Contoured Design * Allows baby to mimic natural sucking pattern for improved suction Matte Surface * Allows baby to latch easily and securely One Piece, Hassle-Free Design