Patent ID: 8353414

Claim:
A stopper for a container neck, which stopper has a tubular skirt that is centered on an axis, that is suitable for surrounding the neck externally, and that is provided firstly with internal snapping means for snapping it onto the neck, these snapping means being suitable for fastening the stopper removably to the neck, by engaging with an edge of the neck, and secondly with an external manual disengagement tab making it possible to unsnap the stopper from the neck, which tab projects outwards from the skirt and runs over only a peripheral portion of the skirt; wherein the skirt is further provided with an external collar that projects outwards from the skirt, and that runs over a peripheral portion of the skirt that is distinct from the portion associated with the tab, by being separated from said portion associated with the tab at either end around the periphery of the skirt, at least a portion of the collar that runs through greater than 180° about the axis having, in cross-section relative to the axis, a circular outside profile that is both centered on the axis and that also has a radius that is substantially equal to the maximum radial distance (R 14 ) between the axis and the outside profile of the tab.