Ice Cubes: Pour the leftover (clear/citrus) soda into ice cube trays to use in punch, lemonade, or the next time you drink pop. This way, your beverages won't get watered down. Here is my favorite and extremely simple punch recipe using Sprite, Sierra Mist, or other citrus pop.
The fizzy soda can give your toilet a spotless clean in a pinch. Pour Coca-Cola along the edges of the toilet bowl — the carbonation will take care of the heavy lifting for you! Leave the soda in the toilet overnight. The next morning, flush the fizz away and your toilet will look good as new.