There is described a closure assembly for a container filled or fillable with a pourable product. The closure assembly comprises a lid, a first ring member, a second ring member, a coupling element connected to the lid and one of the first ring member and the second ring member, at least one rupturable first coupling bridge connecting the first ring member and the second ring member to one another; and at least one rupturable second coupling bridge connecting the second ring member and the lid to one another.