Abstract: A stackable storage container for storing articles has a box having a bottom, a pair of opposed side walls, and a pair of opposed end walls. The walls extend up from the bottom to a free edge, and the opposed walls angle away from each other as they extend from the bottom towards the free edge. The bottom and the walls define a storage space for articles. The free edge defines an opening for access to the storage space. A cover has a top and a downwardly depending lip for engaging the walls adjacent to the free edge for releasably retaining the cover on the box and an upward projecting rim for engaging the walls of a second box adjacent its bottom for releasably retaining the second box on the cover. One of the end walls has a cut-out therein opening onto the free edge. A ledge bordering the cut-out and projecting outboard has a track for receiving and retaining a movable insert panel there for selectably opening and closing the cut-out.