This Low Calorie Vodka Cranberry Cocktail is just 149 calories thanks to my low calorie cocktail trick. I didn't cut any of the alcohol from the recipe, but I did swap out the cranberry juice cocktail to unsweetened cranberry juice. The flavors are much stronger and you don't need as much juice, and then I added seltzer water to turn this into a sparkling version. Special Tip: If you don't like or can't have sparkling water (club soda) you can swap it out for flat water. The drink will still be yummy!!