I am trying to decide on a toilet for my newly remodeled powder room. After researching several sites including yours, my first choice is the Guinevere--for both function and design. I have also been considering Kohler's one piece "Devonshire" similar in design. My question is that our house is supplied by a well and in the past our older American Std. toilets would " sweat" until we had insulated liners installed. Does Toto make any liners for Guinevere and or is there a need to insulate it. I can only find that Toto offers the Drake and Carusoe as insulated options. Would very much appreciate any advice or comments you may have concerning these options. Thanks.