Exclusive Vent Reservoir for standard 240ml baby bottles Dr. Brown's Flow. This reservoir reservoir is an integral part of Dr. Brown. This replacement collar is exclusive to Dr. The standard Brown is 240ml 2 Pack. If you need to replace the entire ventilation system for baby bottles, Dr. Brown's Natural Flow, you will also need Vent Inserts instead of Dr. Brown. - Dr Brown's Vent Reservoirs for 240ml Narrow Neck Bottles - 2 Pack
