PREEMIE BABY BOTTLE. Featuring our slowest-flow teat, the Dr. Brown’s Preemie Flow teat offers a very slow flow for premature babies or others with feeding difficulties ANTI-COLIC BABY BOTTLE: Anti-Colic internal vent system is clinically proven to reduce colic, decreases spit-up, burping and wind CONSISTENT FLOW RATE: Vacuum-free feeding is closest to breastfeeding and Dr. Brown’s silicone preemie teats provide a consistent flow so babies can feed at their own pace PRESERVES NUTRIENTS: The anti-colic vent system is proven to help preserve bottle milk nutrients and aids in digestion for a better night’s sleep DISHWASHER SAFE: Safe for use in dishwasher (top rack only), electric and microwave sterilisers or boiling water, BPA Free