Ensure your baby enjoys happy, healthy meals with this Dr. Browns replacement vent kit. When used with an 8oz. Dr. Browns Options Narrow baby bottle, the vent system reduces feeding problems, aids digestion, helps preserve vitamins. As baby develops, the vent system can be removed. Features

Replaces worn out or lost reservoirs for a 270mL Dr. Browns Options Wide Neck baby bottle
Vent system offers numerous health benefits, such as reducing feeding problems, aiding digestion, and preserving vitamins
BPA, PVC, and phthalate-free