Hi Jesse,
As a fellow coffee drinker myself (morning, noon and night), I was equally curious about the answer to this question when considering whether to purchase my first Disney Resort refillable mug. Now many years and refillable mugs later (as my cupboard drawers will attest), I am pleased to tell you that you will indeed be able to fill up your Resort refillable mug with unlimited coffee, tea, or hot chocolate, as well as fountain drinks.
The refillable mugs are only valid at Disney Resort hotels (not the Theme Parks) for your length of stay, for up to 14 consecutive calendar days. Also, in the event you will be purchasing a
Disney Dining Plan, the refillable mugs are included with purchase of the Quick-Service Dining Plan, the Disney Dining Plan, and the Deluxe Dining Plan.
Another benefit of the refillable mug is being able to take it home with you following your trip. My family pulls them out for movie and popcorn nights at home, and I also have another one at my office. There is nothing like a shot of pixie dust with your morning java to start the workday!
I hope you find the Disney Resort refillable mug as valuable and enjoyable as I do - both during your vacation and at home following your trip. Should you have any further questions, please let us know. We would love to hEAR from you again.
Wishing you a magical Disney vacation!
Trish