Something I'm surprised I've never seen before: sacrificial anode toolbox liner. When I went to burning man last year, I brought my toolbox with me. It rained a good chunk of the week, and I needed to use my tools for various things. So of course, when I got back to civilization, some of my tools had rusted slightly. So today I took some copper fabric and wrapped up a couple magnesium rods, and lined the inside of the toolbox with them. Hopefully this will prevent much further rusting!