Three replacement silicone nipples, exclusively for Dr. Brown's Natural Flow Standard baby bottles. Level-1 is ideal for feeding newborns. The Dr. Brown's BPA-Free Level 1 Standard Nipples are part of a complete line of Dr. Brown's nipples designed to grow with your baby. Designed for newborns, the super-soft, high-quality silicone construction ensures that the nipples are comfortable for young mouths, and they encourage positive feeding. These BPA-free nipples are safe for cleaning in your dishwasher's top rack.