My husband prefers Vanilla Coke Zero to regular Vanilla Diet Coke or plain Diet Coke. Lately I've moved to drinking sugar-free flavored syrup in sparkling water. My brother told me about Target's Archer Farms Sparkling Mineral Water, which I like very much. It has tiny bubbles and a clean taste; the minerals give it body (to my taste). Around here it's $1.29 per liter. I add Torani SF choolate, raspberry or vanilla syrup (or some combo) and enjoy that. I can control how concentrated and sweet my drink is.
True, Shel, plain sparkling water is better. But sometimes a diet soft drink serves for my dessert.