As at Old Key West, the answer seems to be "sometimes." When we stayed last in the cabins, they said they HAD mugs but were "out" and MIGHT get more...Huh? I think the laid-back atmosphere at these two resorts makes them think "Well maybe we'll get around to ordering more mugs..." When we were there you could refill them (if you HAD one to begin with!) at the Trading Posts or snack bar (near Pioneer Hall).