Does anyone perform " Coffee to Coins" ...

If so, Do you use a Professionally produced item or did you design your own or just gaffed a cup... If there is a professionally produced product out there.. who makes it, and where can one be ordered from... If there is no professionally made item, would you Buy one if it were produced.... And who first did this routine, is there a credited inventor?

Thanks

BB

Ther is another thread further down on this thread that deals with the coffee to coin issue

jeff