Yes, that's carbonated green tea soda.
Product announcements like this are a good opportunity to take a step back and remind ourselves that the absolute best form in which to enjoy green tea is the tried-and-true one: loose-leaf tea prepared in the traditional way.
This isn't just some you-can't-buck-tradition argument. Researchers have shown that once green tea is brewed, the catechins and other antioxidants begin to break down in a matter of hours. So imagine the extent to which the antioxidants break down in a ready-to-drink concoction that takes weeks or months to get from the assembly line to you.
I'm not saying, "Avoid green tea soda at all costs!"—just don't drink it expecting anything close to the same benefits you can get from good old-fashioned loose-leaf green tea.
And, in the case of Mellow Monk green tea, you know exactly who grew the tea, and you know they grew it in an environmentally responsible manner and paid their workers (themselves!) an honest wage.