If you’re into lo-fi sound, this is a pretty cool trick. What’s more, it’s super easy to DIY. If you’re as busy as I am, though, and you still want to experiment with a tin can mic, it’s hard to argue with the $7 price tag on these from the guys who run getlofi.com. I like the fact that they leave the original labels in place, and that they use 1/4″ jacks. It would also appear that they have some clever trick for resealing the empty can in a good-looking way. At first I thought they were actually using a can sealer to close them back up, but close inspection of the photographs makes me think they probably open them with a side-opening can opener (Wikipedia) and then glue or solder the original lids back in place. Still cool, though.