A stopping device for a container, comprising a circular stopper for closing the neck of the container, and a cap comprising a synthetic material that covers the neck and the stopper positioned in the neck, the cap comprising a cover and a ring for surrounding the stopper and the neck, the ring having a minimum inner diameter larger than the maximum diameter of the stopper, the ring and the cover being produced as a single component and connected by breakable bridges distributed over a circumference of the ring with an inner diameter that is larger than or equal to the maximum diameter of the stopper, and first locking tabs formed on the inside of the ring facing windows that are radially open towards the outside, and second locking tabs facing a closed part, each second tab formed between two first tabs, facing a strip of material separating windows.
