Give your baby a faster flow of milk while controlling gas and spit-up with the Philips Avent SCF634/27 BPA-Free Classic Fast Flow Nipple, 2-Pack. Designed for babies 6 mos. and older, these fast-flow nipples have four holes, which are designed to allow little ones to control the flow of milk just like they do when breastfeeding. With anti-colic valves, these Avent nipples make sure air stays in the bottle and out of babies sensitive tummies, keeping them comfortable and satisfied, and reducing fussiness. Dishwasher safe.