Do any of you drink caffeine? What kinds of caffeinated beverages do you drink? Coffee, tea, soda, energy drinks?

I actually don't drink caffeine anymore. Caffeine helps me concentrate better, but it also makes me sleepy! I've heard it makes some people manic?

I used to drink caffeine in college, though... usually in the form of an energy drink, like Amp, Rockstar, or Monster. My favorite was Fruit Punch flavored Rockstar. It had more caffeine than any other energy drink (as far as I'm aware).

This one: