A storage unit, in the category of a cabinet, bookcase, locker and cubby, as provided which includes a frame defining top, bottom, and side walls to the storage unit. At least one shelf member and at least one shelf supporting member are received in the frame to divide the frame into separate storage cubicles or lockers. The frame is made from two blanks. A first blank forms the top and at least a part of the sides. The second blank forms at least a part of the bottom and may form a part of the sides. Each blank, as well as the shelves and shelf supports, are made from a core having upper and lower surfaces which are covered with a coating. The coating extends beyond edges of the blanks to define a channel which receives a finishing piece. Grooves are formed in the top blank to define bending points and separate the what will be the top of the frame from the sides of the frame. Shallower grooves are formed in the first and second blanks and define one guide channels for the shelves and shelf supports. The structure of the storage units provide sturdy and stable units which may be shipped in pieces and assembled on site without the need for tools.