Head to any chinese herbalist shop, they have the real green tea, it looks like weed and you need a tea strainer type thing to infuse it.

Really nice though and is great on a morning when you feel rough

I drink a half gallon of it a day. Usually one glass for every glass of water I drink. But I have to admit my wife gets it free and it helped curb me off diet drinks. In the summer I can go through a gallon a day easy.