Sweet beverage

It only takes a bit of reading to find that soda, diet soda, and fruit juice drinks are not very good for you. I've tried to like flavored seltzer water, but it just isn't flavorful enough. Luckily I found out about the sweetener Stevia, which can actually help improve the blood glucose levels of diabetics, and is good and sweet, and inexpensive to make:
Crystal Light Pure drink mix
Less than 8 carbs per two quarts, at least in my favorite flavor here (there are other flavors, and smaller packets meant to flavor up a single bottle of water):

Ingredients:
Sugar, Citric Acid, Malic Acid, Stevia Leaf Extract (Sweetener), Sodium Citrate, Maltodextrin, Contains Less Than 2% Of Natural Flavor, Magnesium Oxide, Black Carrot Extract (For Color), Kiwi Juice Concentrate.