It's not really a ridiculous amount of exercise for a small glass of soda. A can of Coke has 140 calories. 30 minutes on an exercise bike will burn around 300 calories for an average sized man. So it's around 15 minutes of exercise to burn off a Coke. Hardly a ridiculous amount.
Fair point, but a small glass of soda isn't exactly the typical serving size. Go to any gas station and that small glass of soda option got turned into 3 or 4 as your default option. As for the claim of drinking as much as you want as long as you exercise, I could see that easily getting out of hand with those types of conversion ratios.
