Abstract: A sequence of containers of equal width and rectangular form with flat horizontal bottoms and flat vertical sides and ends can be placed in sequence one directly above another to form a self-supporting stack of vertically expanded height. By reversing the sequence, the containers can be placed one directly above another to form a self-supporting nest of collapsed height. The individual containers are symmetrical in shape both longitudinally and laterally and, except for incremental differences in length, can be identical in construction. The end-to-end relationship of successive containers can be the same for both stacking and nesting or individual containers can be turned end-for-end at will for either stacking or nesting. The compressive strength of the end panels provides strong support for either stacked or nested containers through upper and lower integral abutments on the end panels which fit against the side panels of underlying containers, when nested, and overlying panels, when stacked.