Designed by medical professionals and Dr. Brown’s® engineers, the Newborn nipple offers a consistent and precise flow rate allowing baby the ability to safely and successfully bottle feed at a reduced flow rate. Created for babies requiring a slower flow nipple than Dr. Brown’s® Level 1 nipple or needing to transition up slowly from Dr. Brown’s® Preemie™ level nipple. Safe for dishwasher and microwave steam sterilization. 100% Silicone; BPA-Free and Latex-Free. One (1) nipple and collar per package.