A tamper-evident closure for a container mouth, comprising a cap and a retaining ring arranged under the cap for retaining the closure on the container, the cap is separable from the ring, the cap and ring are joined by a pair of arms, the arms are non-frangibly connected to a common root at one end, the other end one of the arms is non-frangibly connected at a circumferentially clockwise location from the root and the other end of the other arm is non-frangibly connected to a circumferentially anticlockwise location from the root, whereby the arms permit axial separation of the cap from the ring and assume a generally V-form configuration when doing so and whereby the cap remains tethered to the ring.

A locking cap for a container comprising a neck comprises: an outer body, defined by an upper face and a cylindrical wall, and including a breakable strip extending from the upper face to a free end of the cylindrical wall, a capsule, arranged on the upper face and rigidly connected to the breakable strip, a cage, locked in the outer body, having a generally cylindrical shape, and comprising a plurality of bridges connecting neighboring branches, and a flexible member, one end of which is rigidly connected to a bridge and another free end of which is oriented upward, the flexible member being adjacent to a weak point of the bridge. The flexible member of the cage is rigidly connected to the breakable strip of the outer body.