Desiccant containers for PrintDry

Stackable containers to hold Desiccant in a PrintDry filament drier, in a variety of shapes and sizes. I started off with the thin round ones around the outside - they fit between the outside of a spool and the walls of the PrintDry, so you can have two spools plus a bunch of desiccant all in there at once. Then I figured I may as well make a center piece as well, for those times where I don't need two spools in there and want to spread the desiccant over a larger area to dry faster. The main