After much trial and error with many different sugar free drinks I've narrowed my favorite down to the Gold Peak diet iced tea, which can be found in the refrigerated juice aisle at the grocery store and some gas stations. It has a brewed taste instead of that funny after taste that most artificially sweetened drinks have. They also make an unsweetened version and sometimes I get that and pour it over a bunch of ice with plenty of lemons, and maybe add one pack of sweetner in it but its actually good with just the lemons for flavor and taste!