Device improved vessel attachable to the neck of a bottle, wherein the vessel (1) has a laminar constitution elástica configuration general frustoconical on the side wall of vessel in the vicinity fund is stepped in decline as a slower fringe (3) determining perifericos media elástico coupling with respect to the closure means (12) and sealed (13) employed in the neck (7) of the bottle (2), while in an area immediately attached to your mouth, the vessel (1) is likely to be bound as to fringe (9) substantially cylindrical belonging to neck (8) of the bottle (2) to engage elastically small bumps spheroidal (10) having the bottle (2) in said strip (9); the means being peripherals coupling the neck (7) in such strip lower (3) has, in a position discontinuous and alternately segments (4) where the wall is converging to the 'inland mouth (6) of the vessel (1 ) and that in your butt convergence define strangulation (5) of section elastically expandable diameter idle less than the diameter contour closing (12) and sealed (13) of the bottle (2), and whose choke (5 ) it is located in a transverse plane whose cota agrees with annular channel operatively (11) defined by the usually is neck (7) bottles (2) fitted with capsule insert (12). (Machine-translation by Google Translate, not legally binding)
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