Stopper for closing opening of water bottle, has recess delimited by annular lip coaxial with wall, where portion of wall comes into contact with inner surface of neck of bottle to ensure sealing of bottle

摘要

The stopper (14) has a recess (30) for accommodating a portion of a neck (16) of a bottle, where the recess is delimited by a cylindrical wall (32) and a bottom (36). The wall and an outer surface (20) of the neck cooperate to secure the stopper relative to the bottle. The recess is delimited by an annular lip (38) coaxial with the wall, where a portion of the wall comes into contact with an inner surface (18) of the neck so as to ensure sealing of the bottle, and the stopper is made of plastic material with a hardness of 50 plus or minus 5 Shore A.