not sure if you guys are in europe or not, but those brown coffee cups are extremely common in diners, Denny's, Black Bear Diners, IHOPs, breakfast places, etc. all throughout the U.S. i've drained many a coffee from cups just like that back in the college days pulling alnighters in 24/7 diners.
the fact they show up in all those other different movies is not that surprising. if you were shooting a diner scene in america it would almost be more remarkable to not see that coffee cup.
interested in getting one for yourself, a restaurant equipment store will suit that purpose.http://www.webstaurantstore.com/7-5-oz-bell-shaped-brown-coffee-china-mug-36-cs/561C68807.html
but you get a better deal when you buy more than one at a time.