No, you're not supposed to do this. But the prospect of basically shotgunning a beer in shot form seemed like a no-brainer... until the explosion of hops, malt, and a 58% blast of booze made the quick trip from my belly and back into my mouth faster than you can say "charf". I'm pretty sure that this would make even Grizzly Adams barf. And that dude could pound them back.
While these aren't the kinds of beer you'd drink with dinner at home, they beat the hell out of a warm case of the fizzy yellow stuff shoved into a backpack. Definitely spring for the carbonation device for optimal ease, and resist the temptation to just chug the concentrate, unless you've eaten poisonous berries that you need to get out of your system immediately.