Here are the nutrition facts from their website. Looks like about 6g of carbs per 3oz serving. *Keep in mind* the "regular" size of the sugar free water ice is 12oz, which means there are 4 servings in that cup, or about 24 grams of carbs.
I do not know the answer, but thought I would bump this back to the top. We have a Rita's near us and I have been wanting to try them out, is a water ice like a slushie?