Greg is being modest. He says this isn't a miracle. Well, I'd like to disagree. Or to compromise, I'd settle for calling it a mini-miracle.
1. Grab a stir-stick, and a coffee sleeve
2. Put the stir-stick in the coffee sleeve and have your friend hold both ends.
3. SNAP!! You rip the coffee sleeve straight through the stir-stick, and EVERYTHING is examinable.
Setup is quick and easy, do it right at the prep-bar.
You'll be doing this at every coffee shop you go to.