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Features:Clinically proven to reduce colicDecreases spit-up, burping and gasShown to better preserve nutrients in breast milk and formulaAids in digestion for a good night's sleepOffers a flow rate that supports breastfeedingBPA free, dishwasher (top rack) and sterilizer safe Brown's Complete Options+ Infant Starter Set has mom and baby covered from feeding to soothing to bottle cleaning. Feeding is fuss-free with a wide variety of Dr.