Yes, Gasparilla's and the Beach pool grill sell the mugs and you can refill at both locations. You can also have them filled with soda (not coffee, tea, cocoa) at the bar at the Courtyard Pool. They are Rapid Refill--at Gasparilla's there is a time limit (2mins) b/w refills, and they also only fill to a certain point (CM said you have to use ice!) in the mug. At the Beach Grill it didn't appear to be as regulated!