Because it's summer, I've been trying out a lot of different beverages and drink mixes, some naturally delicious (like, Natalie's Orchid Island Juice Company 100% Florida Grapefruit Juice (Gourmet Pasteurized)), but with quite a bit of sugar; and some low calorie i.e. sugar free or close to it, like Crystal Light Margarita "Mocktail". 4C Totally Light Cranberry Pomegranate Antioxidant Sugar Free Drink Mix belongs in the that latter category.
A serving size of 1/8th tub (which makes 1 cup of drink) provides less than 5 calories, i.e. has 0 calories on the nutrition label. The first time I tried this, I really didn't like the intense, metallic tart flavor. A look at the ingredients list shows that citric and ascorbic acid are the 1st 2 ingredients, so I should have expected such an intense acidic taste. The next time, I added even more water, and although it was still tart, it seemed more manageable and I didn't hate it quite as much.
The other ingredients include, artificial cranberry flavor, potassium and sodium citrate, acesulfame K, purified polyphenols (antioxidants), natural and artificial pomegranate flavor, sucralose, gum arabic, magnesium oxide (prevents caking), FD&C Red 40, tricalcium phosphate (prevents caking), FD&C Blue #1.