A 32oz bottle of regular Powerade Lemon Lime has 213 calories.  Sports drinks are basically a substitute for water, they don't need 80 calories per 12oz serving.  Gatorade only offers a 1/2 calorie version of their drinks.  The other Powerade Zero flavors are, frankly, not that appealing.  At least Zero Lemon Lime tastes like something you would want to drink after working out.  Or slightly overdoing it the night before.