Parts ID box
If your shop is like most, you have cigar boxes, coffee cans and other receptacles all over the place that are filled with screws, nails and other parts.
But, when you go to find the parts you need, it's often turns into a scavenger hunt because you have no idea what's in which container.
Maybe hat's because you didn't have a felt-tipped pen that would write on slippery, plastic coffee can labels. The reason doesn't matter.
Simply use hot-melt glue to attach a sample of the stuff inside - to the outside, where you can see it the next time you're looking.