BrewDog's End of History beer, packaged in a squirrel. (BrewDog)It's billed as the most shocking, strongest and most expensive beer in the world, and if you want a bottle it's too late.

Only 12 bottles of The End of History beer were produced by Scotland's BrewDog brewery and they all found homes within a day of going on the market.

There are several things that make The End of History unique.

First, it has an alcohol content of 55 per cent.

Second, it sells for $800 Cdn.

And finally, each bottle is packaged inside a dead animal.

BrewDog's End of History beer offers a unique packaging look, along with a hefty price tag. (BrewDog)In a tribute to twisted taxidermy, roadkill gathered by the bottlers was used as a unique cloak for the costly bottles.

The initial run of 12 bottles was packaged in seven dead stoats, four squirrels and a rabbit.

The name is derived from a quote by philosopher Francis Fukuyama, implying that this is to beer what democracy is to history, according to the brewer.

"In true BrewDog fashion we've torn up convention, blurred distinctions and pushed brewing and beer packaging to its absolute limits," said BrewDog co-founder James Watt.

"This is the beer to end all beers. It's an audacious blend of eccentricity, artistry and rebellion; changing the general perception of beer, one stuffed animal at a time," he said.