- These replacement VENT RESERVOIRS are exclusively for the WIDE NECK 240ML Dr.Brown's Natural Flow baby bottles.These are same exact pieces that come with each WIDE NECK 240ML Dr.Brown's Natural Flow baby bottle and are meant to replace worn or lost reservoirs.These Vent Reservoirs are an integral part of the Dr.Brown's patented internal part of the Dr.Brown's patented internal venting system,and they work only with the WIDE NECK 240ML Dr.Brown's Natural Flow baby bottle.If you need to replace the entire venting system for your Dr.Brown's replacment VENT INSERTS.
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