Okay, so I have to ask. When you say "What are the advantages and disadvantages of using soft drinks?" I just have to ask...use them for what? I mean, they're really just for pleasure most of the time. Your question did lead me to ponder, though, about those who use soft drinks as more than just a good-tasting beverage. Like coffee, caffeined soft drinks can be used to alter moods or get relief from headaches. (Ever met someone with a bit of a caffeine addiction before they've had their morning "fix"?!) I suppose those are two valid uses for this tasty beverage.