Yeah, I quit cola, although I stopped drinking the sugary crap years ago; that stuff is insanely unhealthy, not just for your teeth, but for your whole body. Seriously, it's scary how unhealthy it is. :| Life is precious, guys, ... we only get ONE body so we gotta take care of it. Caffeine is unhealthy, too. If you want energy, stay fit, try to sleep properly, and eat healthily; it does make a difference, at least normally.