BornFree - Active Flow Eco Deco Baby Bottles 9oz. Twin Pack (260ml) BornFree Active Flow Eco Deco Baby Bottles. Nature in the Hands of your baby. ActiveFlow bottles feature a silicon valve that allows milk to flow only when a baby suckles and lets babies control milk flow according to their changing needs-like breastfeeding. In addition, a patent venting system reduces pressure during feeding and is designed to help ease painful colic symptoms. BornFree Active Flow Eco Deco Baby Bottle: Babies control milk flow-like nature intended Helps minimize middle-ear infections Soft silicone nipples Designed to help ease colic symptoms Ideal for breast and bottle combination Safe Plastic Top Rack Dishwasher Safe No Leaks What is Colic? Colic is believed to affect about 20% of otherwise healthy well-fed babies. Colic is a broad term which is defined by its symptoms rather than a particular cause.