I've been seeing a lot of Mio's distinctive triangular-shaped bottles at various grocery and drugstores, but wasn't (and still am not) quite sure what it is. I think it's a powdered drink mix like Crystal Light? But... hip, I guess?
Anyway, you can get a free sample if you're curious. "Like" them on Facebook and click on the "Watering Hole" tab to enter. It will try to get you to invite your friends, but you can click on the "I just want my free sample" and avoid that nonsense.