They're freaking expensive, too. Plus they don't really work. Its been at least 5 years since I've had an energy drink, but I remember that they didn't really work well if you had more than one a month or so.  I think that's why energy drinks just kept getting bigger and bigger. It doesn't even make sense: if they're supposed to boost athletic performance, how does swallowing a fifth of a gallon of sugar water help, it just makes you bloated which in turn would inhibit athletic performance. I suppose that's the purpose of those little two ounce energy "shots". Regardless, why spend so much money on a huge sugary energy drink that doesn't work when you can buy a coffee that has zero calories and works way better?