I think regular old green tea w/out sweetener is the way to go. I’ve only found one brand of bottled teas that are unsweetened; Teas Tea. They have seveal different brews and there is always a haiku on the bottle. Very oovy groovey I know , but I love it.
It seems as though “green tea” has kind of become a buzz word to connotate healthfulness; kind of like “oat bran” was a few years ago. Splenda and other artificial sweetener scare me. I don’t like sweetened drinks anyway, I’m sweet enough already 