Accessory for use in e.g. baby bottle, has membrane deforming between rest position in which it is sealed and deformed position in which arrangements permit penetration of air inside bottle

摘要

The accessory has a part (3) comprising a zone (4) that is movable with respect to a zone (5) of a baby bottle (2) under pressure exerted by a user. A deformable membrane has arrangements for passing air, and is positioned between the part (3) and the bottle. The membrane deforms between a rest position in which it is sealed and a deformed position in which the arrangements permit penetration of air inside the bottle.