We were just on the Fantasy a week ago and my mom will only drink her Ceasers with clamato. She asked in the MDR's and was told tomato juice only. One day she asked at one of the bars, and they had it! At dinner that night she told the servers and they said that they would get some brought down for her. The head server came over and apologized for not doing that in the first place. So long story short, they have it at the bars, and if you want it at diner, just ask