Abstract: A lightweight shipping container includes two parallel side walls each having a top rail and secured on the opposite side to bottom rails of a floor frame, coupled to one another by a floor, secured to a multiplicity of cross-beam members. A front end assembly is secured to one end of the top and bottom side rails and a door end assembly opposite the front end assembly is secured to an opposite end of the top and bottom side rails. The container further includes a roof secured to respective ones of the top rails of each of the two side walls. The floor includes a metallic cellular panel including a metallic cellular core of multiple polygonal cells, each including opposing horizontal walls coupled to one another at each distal end by at least one perpendicularly intersecting wall of half thickness as that of the opposing horizontal walls.