Lansinoh Natural Wave Nipple Bottles Medium Flow 3 Bottles 8 Oz Each Triple Pack AVS Air Ventilation System Reduces Potential Cause of Gas Encourages Natural Oral Development Enables Baby to Use Feeding Actions Learned at the Breast Fewer Parts Easy to Assemble and Clean Contains Three Bottles With Naturalwave Nipples BPA BPS Free Soft and Flexible Parent Tested Parent Approved Winner One bottle to pump, store, and feed Interchangeable wide-neck bottle that fit with Lansinoh Double Electric and Lansinoh Manual Breast Pump Range Pump - Store - Feed Based on 50+ years of research, the patented NaturalWave Nipple: Enables baby to replicate natural sucking actions learned at the breast and allows for seamless transition from breast to bottle and back Clinically Proven Reduces nipple preference in established breasted babies Unique Contoured Design Allows baby to mimic natural sucking pattern One Piece, Hassle Free Design 1 AVS Air ventilation system reduces intake of gas, a potential cause of colic or spit up 2 Nipple Tip Baby controls milk flow 3 100% Silicone Super soft and flexible, designed for optimal compression 4 Inner vertical grooves Strengthen the structure of the nipple; making it collapse resistant 5 Matte Surface Allows baby to latch easily and securely