0.5 liters of vodka, sealed – is that too much for you?

I wasn't trying to set records, but in 9th grade, I could already down 0.5 liters of vodka in one go without a chaser or snack. The most I ever drank (not in one go, of course) was 1.5 liters, and I was still able to stand. And when they hit me in the face, I would fall headfirst onto the asphalt, get up, and somehow manage to fight back.