It's really kind of funny that this came out around the exact same time as I'm trying to gradually crunch my way through an Altoids tin so I can use it for a mini-toolkit. I've been having a weird bout of synchronicity lately. Improvise a toolkit on McGuyver's birthday, brushing up on my calculus on Newton's deathday, and learning a magic trick on Houdini's birthday. All in the same week or so, completely by accident.
Actually, I was thinking of making a doohickey-tin, more than an all-purpose one. Something that can be used to build just about any simple electronic device. I want to throw in a battery, resistors, some diodes, LEDs, a few transistors, a mini-magnifier, a voltage regulator, a couple of capacitors, some wire, a piece of cardboard, something to punch small holes in it, conductive glue, a small speaker, and some electrical tape. I feel like the Altoids tin is big enough to hold all of these discrete components without any problem.