What you have to realize is that you're drinking a LOT more of the soda, coating your entire mouth before you swallow. When you vape, you're vaporizing a very small amount of juice that comes out in a sort of mist, and then hits your tongue, before you inhale it into your lungs.
Lets say you vape 15ml a day. Even if you were vaping
@AndriaD rather flavor rich ejuice, that's only 2.25ml of the Shisha Strawberry over the entire day. I believe someone else said they vape Shisha Strawberry at 8% as a singular flavor. For him, if he vaped 15ml a day, it would be 1.2ml. Now, if you were to assume that your drops are actually the standard size of 20 drops per 1ml, that would be 24 drops. Now, the 8 sodas to equal that over the course of a day is probably a bit much, but I've known many that drink more than that, and there are a ton more flavorings in it as well. It's mainly the caffeine and sugar that are the problem though. To make flavored water like has become popular lately, you would probably have a LOT more flavoring, and probably at least a bit of sugar. For the FA flavors, seems many mix some flavors as low as 2-3%. Now that's quite a bit more reasonable. That would be 0.3-0.45ml of flavoring per day at the 15ml vape, or 6-9 drops.