A stopper device including a stopper, cap and ring provided with tabs for locking onto a container neck and a body for handling the ring. The body includes a first mechanism for transmitting a thrust force to the ring and a second mechanism for activating the tabs. The ring and the handling body are respectively provided with first and second retainers that hold the handling body in a waiting position. The handling body is mobile parallel to the thrust force direction and in relation to the ring, between a first position activating the tabs of the ring and is mobile in translation only in the thrust force direction, and a second position that also activates the tabs and is immobilized in relation to the ring in axial translation. The tabs extend from a continuous edge of the ring and are each arranged in an opening with a closed contour.
