As some of you may know I'm a booze hound and I've stuck to drinking Vodka as it has little or no carbs. However I'm having serious problems with the mixer.. OJ is out. I can't drink Coke because I'm caffeine intolerant. Cranberry has too many Carbs. I'm on Diet Lemonade atm but the evil schweppes company won't put their contents on the bottles. Has anybody got any good ideas of a mixer?

Thanks
Larrs