It's TAZO Iced Green Tea.
This stuff is awesome. I don't really know where you can buy it locally or if there are any chains that sell it consistently. I have only found one place in the Waco area that stocks this - the shop in the parking garage across from Hankamer at Baylor (You Wacoans will know what that means). Wow. So good. It's a green tea with lemon grass, spearmint, lemon and other herbs. Excellentlly yummy. I've been on this health kick as of late, so it's good for you too.