Abstract: A packaging container that is made from a flat sheet of material or extruded material with score lines that fold into a plurality of side panels, 3 or more, forming a tubular member having a longitudinal axis. The bottom folds concave and the top folds convex forming triangular webs having apexes which join at the longitudinal axis with the side edges of the adjacent triangular webs sealed together providing structural rigidity. The webs fold inside or outside and the scores can be such that a plurality of variations can be created for different appearances of the container. Protrusions extend outward from the apex of at least some of the top and bottom web panels which provide a means for sealing. Flaps on the ends of the side panels fold and seal together either to the inside or outside. The container can be stacked and nested.