Panels and support bases are individually pressure-molded in one piece. The support base is in a grid pattern, with the top surface reinforced by curved intersecting ribs. The bottom and top are nested together to form a single unit, with screws used for reinforcement to enhance the fit of the top and bottom surfaces. The design allows for four-way forklift access, making it suitable for stacking and shelf use. Convenience in transportation is considered, as the top and bottom can be separated for shipping, saving space and transportation costs.