Dr. Brown’s Level 1 Wide-Neck Nipple is a great place to start for many babies, offering a slow, paced flow. Dr. Brown’s uniquely designed Wide-Neck Level 1 Nipple works together with our patented internal vent system to help babies feed at their own pace. Each Level 1 Nipple offers the same consistent flow, so both you and baby know exactly what to expect. Made of super-soft, high-grade silicone, the Level 1 Nipple fits all Dr. Brown’s Standard/Narrow Bottles. The suggested age range for the Level 1 nipple is 0 months+ but baby’s preferred flow rate may vary. Dishwasher (top rack) and sterilizer safe nipple. BPA free.