I DON'T recommend using water though. Just milk is perfect. 2% is the best. But nonfat works too.
I also work in a cafe where we serve the Tazo chai and have had that on numerous occasions... I still prefer the Oregon mix hands down. And I wholeheartedly recommend it to anyone who asks. Tazo tends to be way too sweet for me. Oregon is sweet enough, but no overpowering and sickening.
Do buy this product if you're curious though, it's really really very good. <3