Dr. Brown Options + Baby Bottle Replacement Kit is an integral part ofDr. Brown’s Options+ narrow bottle of 8oz/250ml. Replace any worn or lost Dr. Brown’s Options+ bottle parts with the Dr. Brown’s Options+ Narrow Replacement Vent Kit. The Options+ Replacement Vent Kit includes the same pieces that come with Dr. Brown’s Options+ bottles and exclusively fits Options+ Narrow 8 oz./250 ml bottles. The Replacement Vent Kit is ideal for replacing any worn, damaged, or lost Options+ vent system parts. This kit is only for Dr. Brown’s Options+ narrow bottle of 8oz/250mlbaby bottles (not for 4oz) To replace worn or lost parts Top rack, dishwasher safe Recommended for babies 0+ months.