Abstract: A transportable container comprises: a sidewall; a front wall; a floor; and a subfloor, wherein the subfloor is removably attached to a bottom of the floor, wherein the subfloor comprises: two or more rails, wherein the two or more rails matingly engage with two or more hoist rails of a roll-off truck; and two or more rollers. The roll-off truck can include a system for loading, transporting, and unloading the container and subfloor. The system can be a cable/winch system or a hook/lift system. The subfloor can be removably attached to a floor of the container via welding or spot welding, fastening, bracketing, or bolting. The container can be any type of container that is not capable of being loaded, transported, and unloaded using a roll-off truck.