Charley why not use a non-slip strip on the bottom of these boxes. What I had used for my sheet goods dolly is about 3" wide and looks like a dark gray extremely course sandpaper. Those boxes remind me too much of the therapy boxes used after I had my knees replaced.....both times.Nick,
You posted while I was typing.
No, there is no lip. A lip is not a standard feature on commercially made Apple Boxes. They just stack together. I'm hoping that the satin polyurethane won't become too slippery, but if it does, I may have to sand it off or coat the tops and bottoms with something, maybe silicone bathtub sealant, to keep them from sliding. It is a concern, and probably why most of these are just raw wood or sprayed with a thin identifying paint color, but I wanted mine to stay clean, and not so rough looking. I'll find a way, or sand the poly off the tops and bottoms if I can't.