I have come upon what I believe to be a new use for the common eyedropper.
As a cabinetmaker/carpenter I find myself often using my electric drill to drive screws. The Phillips-head bit I use was always being misplaced or falling to the bottom of my work pouch. I taped the bulb part of an eyedropper to my drill cord. It holds the bit quite well.
I use the tube portion to convert an old shampoo bottle into a fine glue bottle. I drilled a hole in the screw cap of the bottle and slid the tube into place; the hole was sized by testing the tube in a drill index and drilling the hole 1/64 in. smaller. This glue bottle can be any size and has a tip that will reach hard-to-get-at places.
Mark Hallock, Arcata, CA