The present invention relates to a storage unit for containment, shipping, and storage of articles. The storage unit includes a base and a frame. In various embodiments, the frame may be generally rectangular and defining a storage region therein. The base of the storage unit is designed to matingly engage with a removable wheeled dolly. In a typical embodiment, the dolly facilitates maneuverability and positioning of the storage unit, particularly in confined areas. In various embodiments, a single dolly may facilitate manipulation of multiple storage units, wherein the dolly may be attached to a storage unit while the storage unit is in use and removed when the storage unit is in long-term storage, thereby reducing the space required to store the storage unit.