Yes, if I recall correctly, Coca-Cola had to remove Dasani from the shelves in Europe almost immediately because it was just tap water.
Your body is a machine: water is the lubrication. Water regulates your body heat and is used to regenerate and promote cell growth. Nothing can replace water. Small amounts of milk are good, but as a source of nutrition, not as a replacement for water. The same argument could be made for teas. I have no opinion about coffee: I rarely drink it and when I do I am extremely picky. Sodas, fruit juices, “energy” drinks, etc. are all pretty much a bad idea. While caffeine may not dehydrate you (and again, it might, the point is definitely open to debate), sodium definitely will. I’m very fond of Sobe, but I quit drinking their products when I started watching my diet. They advertise as being healthy, but sugar wise they are cram-packed.
Thatguy69 - if you are drinking bottled teas, beware: there’s not a lot of difference between them and soda. Check the labels.