packing containers with fold - out pouring spout are used for a great number of beverages , e . g . milk . the pouring spout comprises a number of connected triangular wall panels which are delimited by folding lines . on opening , the pouring spout is folded out and the packing container is opened in that an outer end of the pouring spout is removed . to prevent the pouring spout from reverting to its folded - in condition after opening , the folding lines which delimit the material panel of the pouring spout from the upper side of the packing container are arranged so that they run at unequal angles . in this manner the breaking open and the forming of the pouring spout are facilitated .