Abstract: The present invention relates to a single paperboard sheet of material which can be folded upon itself to form a container which can support in its interior material to be provided in roll form with a supporting core. The sheet comprises four major wall panels which are aligned in a row with a major flap insert panel, each of the major wall panels having a pair of minor side wall panels aligned with minor side edges of the major wall panels, at least three of the of the major wall panels having pairs minor side panels aligned at minor side edges with holes therein, with at least two adjacent pairs of minor side panels and the major side panels most distant from each other having holes therein. This sheet may be folded upon itself to provide a self-supporting carton with holes in opposite minor side panels which can support a core or a roll of material on a core. Internal locking pieces may be provided so that no stapling or gluing of the panels is needed to secure the carton together.