As a European I really don't get take-out cups, in most Western Europe there are two options: either you have the 3 minutes it takes to sip on a cappuccino or hot tea, or you drink an espresso standing (both in a ceramic cup). If you see someone walking around with a pint of hot beverage, it's a safe bet they are American. I heard some American friend that it's part of American culture to control climate: drinks must…
However, a lot of places will give you a discount if you bring your own cup.