I think I may be the first person to think of this design. It has two parts plus a suction cup or whatever.
1. clear plastic eye shadow case with screw-on lid, 3 cm dia., 5 ml volume, $1 at walmart
2. tyvek from a USPS mailer, $free
To assemble, ditch the eye shadow and drill a hole in the case's cap, as big as possible, so that you're basically left with a threaded hoop (just like a canning jar.) Stretch tyvek over the body of the case, and reapply the lid, sandwiching the tyvek between the threads. Oh, fill the thing with drop-checker fluid first.
Pictures forthcoming, as well as an estimate of the response time. I'm trying to think of ways to diminish the volume of this thing so that the response time could be improved. I suppose I could press the tyvek down into the body of the jar, but that would make it harder for the threads to seal.
edit: fuzzy pics, and it looks like the response time is less than 1h30