Dr. Brown's Natural Flow Anti-Colic Nipple Level 2 Medium Flow 6-Pack SN261 Dr. Brown's Natural Flow Anti-Colic Nipple 6-Pack features a breast-like shape designed to encourage a proper latch for a more natural bottle-feeding experience. These Level 2 medium flow nipples are ideal for babies 3 months and older, providing a consistent flow rate that eases the transition between breast and bottle. Made of super-soft, high-grade silicone, they are BPA-free and compatible with Dr. Brown's Narrow baby bottles. The anti-colic design helps reduce feeding issues, ensuring a happy feeding time for both parent and baby. #kidcore