@Antedeluvian - good idea. In travelling toolkits I try to include an analogue multimeter (with a meter and a needle - remember them?) because they don't need a battery to measure volts and amps and it's easy enough to include a spare AA battery in the pack in case the ohms battery does run down. They are pretty rare these days though.
But one of my suppliers had some dinky little DMMs - about 3 x 1-3/4 inches - for $5 some time ago, and it would be ideal for a travelling kit (as long as you remember to switch it off before putting it back in the kit. Also for mounting next to your breadboard. Not top-notch by any means, but neat and adequate for these uses. No pic I'm afraid, if I can find one I'll post it. You also get the larger, but thinner, wallet type DMMs which are also good for toolkits.
OK, here's a pic and a link. The size is 94 x 46 x 26 mm (3.7 x 1.8 x 1 inch)
That's pretty cool -- it looks like the main difference between this and the other one (apart from the much lower price) is that thsi doesn't include the Apple-specific screwdriver bits, and I couldn't care less about those :-)