I've an odd addition to this list.
Recently I've started painting again. This involved checking out my art supplies re painting with oils, especially the painting tubes and how they've weathered the time I haven't used them. Really very well, I don't have to buy more (at least not for now). Which is good, since some of the tubes still have prices and they were high priced when I got them. One tube from the early eighties (interesting brand, as it happens), was about twelve dollars. But two tubes were missing their caps, and one cap broke. I cleaned the tube orifice on the capless tubes, messed around the paint inside with my handy somewhat antique awl, and then.... and then .... plugged the openings of those three tubes with appropriate sized screws and screw tops to keep any paint, except a tiny bit, from drying out.
Sort of like the top one:
Easy enough to pull out with my handy pliers when I need those colors. I can then either toss the screw and use a new one, or clean the thing.