A Coffee Conundrum Puzzle

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=yKXKXwPINJY

Rob asks a simple question, and you can see the problem before your own eyes, but how easy is it to work out the answer? Oddly, a pack of cards helps here.

Curiosity Show, Curiousity Show, Deane Hutton, science, Rob Morrison, Australia, Myth, Mythbusters, how to, education, puzzle, trick, STEM, maths, maths puzzle, coffee, physics puzzle, liquid puzzle, baffling puzzle, card trick
#############################