beer I've had in my life.
Koelsch
Koelsch is a German beer that is only served in Cologne as draught beer.
But actually it's not beer at all, it's more of a drink to dehydrate. If you drink a liter of Koelsch, you can put 2 liters in the toilet.
A second point also points out that this is more of a health drink. The glasses are smaller than a Russian vodka glass, but more expensive than a real beer.