I have never been a big sport drink consumer. At rides they only seem to have the bad tasting lemon/lime stuff. I think the only reason it is at the rides is because their inventory needs to be lowered because nobody will buy it.

The Potassium Deficiency Myth
from Fitness & Health with Dr. Gabe Mirkin by Dr. Gabe Mirkin
Sports drink promoters have convinced many athletes that they need special drinks to replace potassium during exercise. A recent study of female soccer players confirms that this is a myth (International Journal of Sports Medicine, June 2009). When body levels of potassium are low, the kidneys and sweat glands conserve potassium so effectively that potassium deficiency rarely occurs. …