Lansinoh mOmma Natural Wave Nipples Medium Flow 2 Medium Flow Nipples Clinically Proven to Help Maintain Established Breastfeeding Patterns Designed so babies can easily switch from breast to bottle and back AVS - Air Ventilation System reduces intake of gas, a potential cause of colic or spit up Breastmilk is the ideal food for the healthy growth and development of infants and young children. Warnings Important: Please read and retain enclosed instructions. Disclaimer While we strive to ensure the accuracy of product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our listings. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided. UPC Code: 044677710268