Five years ago I picked up a bunch of trays at a woodworker's estate sale. It was a cheap and useful way to organize things. But stacking them became inconvenient. Now they are becoming drawers. About half done now. But so much better.
I usually leave mine on my table saw fence. One place, easy to find and return. Since this came with two I'm thinking one might go on the planer and the one on the fence may get a magnet glued to the back just to prevent accidents.