Package

The invention relates to a package of the type having a container body with four side walls, opposite each other in pairs, and a top end wall which along a lateral edge is joined to the container body through a triangular, double-walled lug. The package, moreover, possesses a sealing fin which extends from the point of the said triangular lug and out over the top end wall. This sealing fin is folded down along at least a portion of its length against the top end wall and is retained in its folded down position. The said sealing fin has one or more cuts or perforations weakening the packing material. The cuts are arranged preferably at right angles to the sealing fin in the material layer of the sealing fin which is nearest to the top end wall in the folded down position of the sealing fin.