A container includes a plurality of weldable hybrid composite panels. Each panel includes a four sided composite panel element, wherein each of the four sides defines a side edge and the composite panel element is formed of fibrous reinforcement layers encased in a resin matrix. Weldable metallic elongated edge elements extend along and are either fixed to the side edges of an outside surface of the panel element or extend from a periphery of the panel element, such that each of the weldable elongated edge elements has a profile that is the same as a profile of its respective side edge. The weldable elongated edge elements are structured to enable the composite panel to be welded at its peripheral edges. The container also includes a plurality of metal rails attached together and defining a rectangular parallelepiped frame having six sides. At least one of the plurality of weldable hybrid composite panels is welded at its edge elements to the rails of each of the six sides of the frame or to an adjacent one of the plurality of weldable hybrid composite panels.