I'm currently working on a routine/show in which I have a very good idea of the structure of the show being around friends sharing a drink (I work a lot of bars), but I'm at a bit of a loss for any tricks that could involve the drinks themselves, and I would really like to explore this idea.

Does anyone have any effects that use a person's drink as the revelation? Specifically a pint of beer by chance?

Any and all thoughts/sources are welcome.