Sale Rental Of New and Used Containers - Rollback Delivery AREA: MD, VA, DC, DE, PA, WV. We specialize in the modification of containers to your specifications. Modifying containers for Government and Military special projects into mobile office, modular control centers, special training buildings, or any use necessary. We stock shipping containers, used storage containers and cargo containers, new and used ISO conex containers and reconditioned shipping containers; heavy-duty, ground-level storage containers, cargo containers, refrigerated containers; open-top containers; customized office containers; and container chassis.