Dr. Brown’s® Level 1 Narrow Nipple is a great place to start for many babies, offering a slow, paced flow. Dr. Brown’s uniquely designed Level 1 Narrow Nipple works together with our internal vent system to help babies feed at their own pace. Each Level 1 Nipple provides the same consistent flow rate, so both you and baby know exactly what to expect. Together with the anti-colic internal vent system, the Level 1 Nipple offers vacuum-free feeding that is clinically proven to reduce colic, decreases spit-up, burping and gas, better preserves nutrients, and aids in digestion for a good night’s sleep.  Made of super-soft, high-grade silicone, the Level 1 Nipple fits all Dr. Brown’s 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. BPA free.