I actually use 4 of them. 3 are large Dewalt boxes with the guts partially removed to fit the new contents. I used a plastic cutting tip on a soldering gun. One box holds paint brushes, rollers, & other paint related tools. The second holds trowels, taping knives, etc. The third contains sanding blocks & sandpaper, a block plane for windows or doors, surform planes, & so on. I don't do any plaster or paint at work. These house my home patch & paint tools. They are flat sided so they stack well.
The 4th is an old Makita box. I drilled holes & cut away part of the inner lining & added a couple of toggle switches, a pushbutton switch, & wiring with alligator clips to make it into a remote under the hood starter & ignition switch kit. There is also room for a meter & jumpers. It has been a handy setup for many years.
And I have thrown away several others that did not lend themselves to useful purposes.