Materials: Expedit (Kallax)
Uhaul small moving boxes are the perfect size for the Expedit. At 16 3/8″ deep they are a little long, but the extra depth is almost exactly the distance the Expedit is offset from the wall because of the molding on the floor. Paint the front of the box and you have great storage for $0.68 a square. If you put a lot of weight in the box bolt some thin wood to the front so it does not flex when pulling and pushing it.
Make sure to paint the side facing out the first time 🙂