You can get refillable mugs at the YC at the pool bar, Hurricaine Hannahs, Beaches and Cream and at the bar off the lobby at the YC (Riptide I think?). In the morning, in the bar they have a continental breakfast things and coffee. The coffee was very good. No problems with the mugs - this last trip was the first time we did it and it definaltey paid for itself (we were there 10 days and spent many days at SAB).