I guess I have heard of birch beer, but not just drinking straight sap from birch trees.
It looks like locally I could get some through Izze, though it says “Made with real fruit juice concentrates, other natural flavors and nothing artificial.” It doesn’t say “100% birch sap” like I’d expect, and like Adamba serves up – “Ingredients – Pure Birch Juice.”
Maybe I can just go lick some baltic birch ply in the garage. I’m guessing the juice tastes a bit like popsicle sticks, as those are usually made from white birch (Betula papyrifera).
-- Gary, Los Angeles, video game animator