We’re deeper than 10 comments so I hope you don’t mind me dropping this here. It was also made as a result of @Jules and her challenge.
I spent about a minute in F360 making a 3x3 cube, then throwing a 10 degree draft on 4 sides. I then brought that file into Slicer to see if I could do anything with that. I haven’t really used Slicer before, so this was a quick try.
I wasn’t going to print it at first. Your tray came out better, but this did the proof of concept I wanted. I need to tweak a few settings still, it goes together good but is a little looser than I’d like. I probably need to revisit the kerf settings since I let them default.
This is printed with the draft material. It took longer to print than to design, and it printed pretty fast as all cuts. The output from Slicer was a PDF that went right into the GFUI.
This would work well for paint brushes, pens and pencils but I need to glue it up and put a bottom on it. The lazy susan idea sounds good though.