Drinking joke from Finland

Pekka and Jukka are sitting in a cottage in the middle of nowhere. For 3 days they are drinking like hell, before they finally run out of booze. So Pekka says to his mate: “Go and look in th shed. Maybe there’s something left we can drink.”
Jukka returns after a few minutes with a bottle of menthanol in his hand. He looks at Pekka and says: “Well, we could drink this, but it’ll make us go blind.”
Pekka then looks around the cottage, goes up to the window and peaks outside, then slowly turns to Jukka and says: “I think we’ve seen enough.”
http://lordsofthedrinks.com/2014/02/19/a-drinking-joke-from-finland/