Moonshine

The expression moonshine means the home distilled "illegal" alcohol. Perhaps the idea of Koskenkorva in this movie first appears when german and finnish soldiers are making their own spirit in some sauna or in the forest. And the moonshine being the spirit and the shining moon in the sky makes the man Hans Kammler dream about antigravity motor and make this big invention.

So that connects Koskenkorva to the storyline. There is allways a bottle of Koskenkorva or a pre-form of it "moonshine" available for Hans Kammler for inspiration...and soon the nazis will fly to the moon!

http://en.wikipedia.org/wiki/Moonshine