Rapid Refill Mugs are available at all of the Walt Disney World Resorts for a flat fee for your length of stay. They are also included with the Disney Dining Plan. While they are convenient for your morning coffee or a day off by the pool, remember that you can only use them at the Walt Disney World owned resorts. The only thing that you can fill them with in the parks is water, so you might want to leave them in your room instead of lugging them around with you all day.