A coworker passed this video on to me.
Gets the point across.
Disposable – The Billion Cup Blood Bath from Zac Whyte on Vimeo.
Watch a video on how the University of Northern BC is celebrating Green Day by focusing on waste reduction. The Green Day organizers have adorned the ceilings with used disposable coffee cups from waste audits showing how there is too much waste.
A clip from the film that is (partly) about reusable cups (except the last skit). 
Coffee and Cigarettes, a film by Jim Jarmusch.
Check out Battlefront, another campaign to get you to bring your own cup and the nice video that goes with it:
Trailer for short environmental documentary on paper waste, recycling and disposables called For the Price of a Cup of Coffee. Available at Green Planet Films.
Nicely done school project demonstrating the disposable waste stream of our society–namely paper cups.
Watch http://www.youtube.com/watch?v=fwEZnAXyglY
An okay solution for offices/public areas as all the components are recyclable.
