There is provided a container useful to hold a document such as a photograph for transport such as mailing. A first conveyor belt system cascades solid waste over an end of the belt system whereby the heavy fraction material falls downward to a first collection area and the mid fraction and light fraction material are conveyed by a first planar sheet of air to a second conveyor belt system. The protective layer, which is preferably an overlay coating of the beta phase NiAl form, is formed by depositing nickel, aluminum, rhenium, and modifying elements onto the substrate surface. The policies, such as encryption and decryption policies, comprise at least a first sourcedestination policy, at least a first content policy and at least a first virus policy. Preferably, a downward force can be applied to operate either pedal, thereby facilitating quick and easy set-up and break down of the cot structure without compromising safety, consuming too much time, or requiring undue effort. The system comprises a container containing a second fluid, fluid lines extending from the container to the first and second end ports of the cavity, respectively, and a pump for exchanging the second fluid provided in the container and the first fluid provided in the subsea cavity.