Dr. Brown's Level-1 Silicone Narrow Nipples are specially designed for controlled feeding with a slow flow rate ideal for newborns and young infants. Made from high-quality, soft silicone, these nipples are compatible with Dr. Brown's narrow neck bottles and feature the brand's trusted anti-colic design. Key features: • Level-1 slow flow rate ideal for newborns • Made from soft, high-grade silicone • Compatible with Dr. Brown's narrow neck bottles • Pack includes 2 nipples • Dishwasher safe (top rack) • BPA-free material These Level-1 nipples are part of Dr. Brown's progressive flow rate system, designed to grow with your baby's feeding needs. The narrow design works specifically with Dr. Brown's narrow neck bottle collection. The nipples should be replaced every 6-8 weeks or sooner if showing signs of wear. Always inspect nipples before each use and discard if damaged or worn.