A container assembly having an inner container and an outer cover fixedly attached to one another. The inner container has multiple sidewalls for forming the inner container sidewalls and has a bottom forming flap attached thereto. The outer cover has multiple cover sidewalls that fit over the inner container sidewalls to enclose the inner container. At least one attachment member attached to and extending from the outer cover is attached to the bottom forming flap, thereby fixedly attaching the inner container to the outer container. The attachment member can be separated from the container outer cover to allow removal of the outer cover from the inner container without marring the finish of the outside face of the sidewalls of the inner container. A knockdown assembly that is erectable to form the container assembly is also provided.