Watch here, or better still, click here and watch in full screen. I won't tell you what it is because I don't wish to ruin the surprises.  There is a video that shows how the commercial was made here . 

This is from one of those annoying disclaimers at the end of medicine commercials on television. I'm sure he or she duly pondered the script (at a rate of ~$500/hr if what I've heard is correct) and decided that the word "may" needed to be inserted between Drinking Plenty of Fluids  and Reduce Your Chances of Hydration. Of course, I would ask, "May? As opposed to what?" After all, you don't need to be a doctor or a lawyer to figure out that drinking no fluids at all pretty well assures dehydration. So, how do you prevent dehydration except by drinking fluids? Chalk this up to our over-attorneyed society.