DESC: - Avent Slow-Flow Bottle Nipple Set Slow down. This bottle nipple set features a unique form that has been clinically shown to reduce colic. And a soft, natural shape with an antivacuum skirt and a one-way air valve to reduce air ingestion. Important because less air means less discomfort for your little one. With a soft, slow-flow design, perfect for newborns one month and older. Plus, it's specifically designed to help mothers combine natural feeding and bottle feeding with ease! For use with Natural Feeding Bottles and Avent VIA Nursers. Get baby ready early! Visit our Layette Product Guide for more information on newborn basics. Sized for 1 month+ Includes two nipples Dishwasher safe Model no. 193