Agree with above, and go for the whole leaves if possible. I go through nearly a gallon on a daily basis.
A couple tablespoons of the leaves and you can make a concentration that is strong enough to make over a gallon and then chill it if you like.
For a nice change from, time to time ad a pack of nunsweetened koolaid, like lemonade, or really whatever flavor and sweeten with stevia. Damn good stuff. But I use it for about everything. Just drinking as well as Grow! shakes, my Power Drive, Etc…
I am also a coffee feind and will add a little loose green tea leaves to my coffee before brewing from time to time just for good measure. LOL
Hope that helps,