Plenty of cafés already have coffee mugs and glasses. I’m drinking a cup of coffee from a Homer Laughlin mug warmed atop the espresso machine at a small mom and pop establishment right now. When I’m done with it, it will go into a bus bin a few feet away and washed by the staff here whenever they’re not too busy to do a load of dishes.

If I had brought my own cup, it would have been a 10¢ discount but to be honest, their mugs are better than mine.