Paris offers you free pocket ashtrays

Ok well smoking is now prohibited in cafes, restaurants, clubs and bars in France; but it doesn't mean you are not allowed to smoke in the streets! (I can see the happy smoker smiling!)
And in order to do so, the city of Paris makes available these pocket-ashtrays with a "pretty" Mairie de Paris logo!
So now you want to know where to go to get one of these, right?
It isn't said on paris.fr but I found on another site that says "these pocket ashtrays will be distribute in 4 emblematic places within Paris during two weekends and the project will be repeated on Fall 2008."

If you have more info, please go ahead!