It's the one thing I don't like about BW....you have to lug that mug down to the Bakery with you, then they give you a cup with your drink in it. You either have to pour the coffee/soda into the refill mug (and there is spillage because the cup holds more than the mug) or you have to carry the empty mug back to the room, as you drink from the paper cup. Drives me nuts.
I know it's a little thing but it sure would be nice if BW had someplace to refill the mugs that was self-serve. It wouldn't have to be a big area.