Dr. Brown\'s Level T Narrow Nipple offers the ideal flow rate for some newborns, breastfed babies and babies who need a slower flow nipple. Faster than our Preemie Flow Nipple but slower than our Level 1 Nipple, brand-new and developing babies may find their happy middle ground with Level T Narrow Nipples. The Level T Nipple offers a more gradual transition for breastfed babies who have graduated from Preemie Flow but are not quite ready for Level 1. This nipple is also great for any baby who simply prefers a slower flow! Each Level T Nipple provides the same consistent flow rate, so both you and baby know what to expect. Together with the anti-colic internal vent system, the Level T Nipple provides a controlled flow so babies feed at their own pace. This vacuum-free feeding helps digestion for a good nights sleep. Dr. Brown\'s bottles are proven to help preserve bottle milk nutrients and are known for reducing colic, spit-up, burping and gas. The Level T Nipple is made of super-soft, high-grade silicone and fits all Dr. Browns Narrow bottles. Level T Narrow Nipples are dishwasher (top rack only) and sterilizer safe.