A stackable and collapsible trolley assembly having at least one collapsible transport container, and a support structure on which the transport container rests. The support structure is moveable on wheels. Additional transport containers can be rested on the assembly, and preferably, are arranged so that a recessed edge at the bottom of a second transport container fits within the open perimeter of the first transport container. The wheels on the support structure are all located inside of the recessed edge, so that the trolley assembly wheels will be located within the opening of a transport container when the trolley assembly is positioned on top of a transport container.