Everything listed above is something that I like, as long as no sugar has been added.

Once in a while, when I'd eat at a Lanzhou lamian (ramen) place in China, one of the elders would steep a curious blend of twigs, berries and leaves. Whereas I wasn't reluctant to have a cup, I had no idea as to what plants and trees the mix came from. Not to mention, water in China is psychotropic (or it should be), so there was always a metallic or generally unpleasant aftertaste regardless of what was steeped. In any event, it was the only sugarless drink available in the neighborhood, besides re-bottled water.