The bad news is, you've got to perform the trick with the foam cup used in the video. The good news is, this particular size is super-easy to find. Very common.
Answered at 10:32am on July 28th, 2014 by ricklax1 (97 karma)
No this effect cannot be performed in a clear class
Answered at 10:23am on July 28th, 2014 by girspiggy (2309 karma)