the invention relates to self - supporting , vertically free - standing display packages for displaying a product . more particularly , the invention relates to a blister pack display package having a preformed product closure attached to a paperboard back and provided with a unitary support structure . another aspect of the invention concerns its manufacture by molding a plastic sheet into said blister package in such manner as to advantageously strengthen said unitary support structure along the edge of its contact with the surface on which it stands .