For all Standard and Wide-Neck Dr. Brown's Natural Flow baby bottles.
These replacement Cleaning Brushes are designed for use with all Dr. Brown's Natural Flow baby bottles. These are the same exact pieces that come with each Dr. Brown's Natural Flow baby bottle and are meant to replace worm or lost brushes. These Cleaning Brushes help keep the Dr. Brown's Vent Inserts and Vent Reservoirs clean and clear of blockage so the patented internal venting system functions properly.