Water Joe
http://www.waterjoe.com/I saw Drew Storen tweet that he drinks it a month or so ago so I ordered a case. It is Natural spring water with a coffee cup/12 OZ soda equivalent of caffeine. And it tastes just like good water. You can't taste the caffeine.
This stuff is awesome. No longer do I have to spend money on overpriced energy drinks/shots that are also unhealthy. Water Joe FTW
