Slushies should not be a summer indulgence. An average 16-oz slurpee, for example, contains 130 calories, 36 grams of carbohydrates, and a whole lot of harmful chemicals. Where do you think the color and taste are coming from? It’s certainly not a natural flavor. Some slushies may not taste very sweet but they certainly are packed with sugar – 36 grams, according to MyFitnessPal. Also, there is a lot of mold in those machines. You think they are cleaned every day?