Dr. Brown's Wide Neck Vent Inserts Description
For All Wide-Neck Dr. Brown's Baby Bottles
• 4 oz/120 ml Dr. Brown's Wide-Neck bottle
• 8 oz/240 ml Dr. Brown's Wide-Neck bottle
These replacement Vent Inserts are exclusively for the Wide-Neck 4 oz/120 ml, and 8 oz/240 ml Dr. Brown's baby bottles. These are the same pieces that come on each Dr. Brown's bottle and are meant to replace worn or lost parts. Along with the Vent Reservoir, the Vent Insert is an integral part of Dr. Brown's Patented Internal Vent System, which allows the bottles to work differently.