Don’t you just hate it when you accidentally put a cup of coffee on papers and it leaves that ugly brown circle behind? Oliver Jeffers takes those ugly brown circles and turns them into the centre of our universe, the stereotypical, cop snack of choice and integral parts of the marching band.
See the rest here.
nosurefooting.wordpress.com 
I love the idea. Such a simple concept and such a great outcome. Thanks!
FRRRRRSTACCINO
Another use for coffee! Brilliant!
cool! although i actually LIKE those rings on my paper:)
When I worked at WWF, they were doing a campaign about green hiking that used coffee stains for their promotional materials, like here: http://wwfindia.org/about_wwf/critical_regions/high_altitude_wetlands/green_hiker/message/
(should have stolen some before I left)