Carl Huber of theWAREHOUSE blog has the guide on how to make your very own Pimp Cup:
Not to rain on your parade, but you probably can't afford the thousands of dollars rappers spend on their glorified dixie cups. Maybe you can, I don't know - but the rest of us usually have to watch our expenditure of ducats and Benjamins. But even the most un-crunkified white boy (me) can afford the ten (or twenty bucks tops) it takes to floss some serious materials. Mine ran $11 and launched an empire.
Link (includes an excellent gallery of user-submitted pics!) - Thanks Becky (and Happy Birthday!)