Soda brands are different mainly because they might be made differently, taste different, have controlled amounts of sugars, or might be selling the same thing.
This largely depends on the soda. Most sodas are slightly on the acidic side. Coke, for example, has a pH level of 3.4. Freaky, right? Strong enough to slowly dissolve teeth and cause damage to bones...
It depends on where you are from. The term pop is used in the Midwest and came from a type of bottle invented in Detroit that was sealed by a rubber ball. To open, the ball was pushed down and a made...