What a cool concept.
I snagged this from a Clay Studio email blast....
"On November 8th, teams of volunteers will spread out to coffee houses around the city and give away 500 free mugs to people who are leaving the coffee shops with their paper to-go cups. With this Guerilla Mug Assault, we will also have an opportunity for participants to share their experience via social media and blogs."
www.theclaystudio.org