Think you have to buy over-priced drink mix to make a lower-calorie cocktail? Think again. You can substitute a few ingredients on your own to get the same "skinny" result. This punch tastes just like a margarita, but uses agave nectar and juiced citrus to get that balance of sweet and tart instead of artificial ingredients, so you get all the flavor without the guilt. Whip up a batch for your next girl’s night!