At the cart just outside the exit to Jurassic Park, they were serving Butterbeer this morning. Cash only, and they went back behind the door to get it, but it saved waiting in line for at least 30 minutes.
They refilled our mugs at the refill price. Or, you can order small or large sizes, both frozen and cold.
The line for the bar isn't too bad once it opens, and you can get Butterbeer in 3 Broomsticks, but both don't open until 10:30 or 11.