a single - use dispensing device for dispensing liquid , pasty and other flowable and fluid substances includes a fillable and sealable plastic container for receiving a substance . the container has a neck end , a filling end opposite to the neck end , and lateral sealing seams defining a lateral contour of the container . an opening provided in the neck end extends through the neck end for dispensing the substance . a plug - like closure means for closing the opening extends throughout the neck end toward an outer portion of the neck end . a first transversal sealing seam extends transversely through the lateral sealing seams of the container at the outer portion of the neck end sealing the closure means from all sides . a tearable perforation seam provided in a portion of the neck end extends transversely through the lateral sealing seams . the perforation seam being displaced relative to the first transversal sealing seam towards the filling end of the container .