Container and closure having frangible opening means

In a container (4) with an opening facing upwards in the top surface and with a closure (15) for said opening consisting of a fastener (6) and a lid (1) which are joined together all the way round by a failure zone (2), said closure being inserted into the opening and forming a seal with the container, and in which the lid is broken open and is torn along the failure zone by a locally applied force, preferably under pressure, whereby force applied in an inward direction will cause the lid to move inwards to a point at which, having moved over a distance a, it will on the one hand make contact with a surface (8) located on the lid running parallel with the top surface, and will on the other hand make any further opening difficult, and in which the lid is also provided with a gripping device for removing the fully or partly loosened lid, the improvement wherein the failure zone (2) of the lid (1) is located at the point at which the internal surface (3) of the opening meets the top surface of the opening, whereby a flange (5) on the container (4) is bonded to the attachment ring (6) of the closure (15), the lid (1) within the failure zone (2) on the other hand supporting the gripping device (9) with which the container is opened, and on the other hand is dished inwards in such a way that the dishing (7) at its outer edge forms a guide (10) against the essentially cylindrical internal surface (3), whereby the surface (8) parallel with the top surface is connected to the guide (10), said surface (8) after the lid (1) has been torn open and if applicable after the lid has moved inwards over the distance a making contact with a ledge (11) located inside the container (4) and forcing the guide (10) against the wall of the container (12).