Sorry, nie wiedzialam ze jest sporo odpowiedzi na poprzedniej stronie, ale 'Are you done with your coffee' slychac w AmE w duzo miejscach. Chociaz ja wole 'Have you finished with your coffee?, can I take your coffee away? ale horses for courses.
Excerpt from Harry Potter:
What? First of all call me Tom. We are going to be best mates. Are you done with your tea? There are some animals we've collected that i'd like you to meet...
Please, don't tell me J. K. Rowling is an American ;-))