Reyka

Reyka is the first vodka distilled in Iceland. The word
"Reyka" derives from the ancient Icelandic word for steam -
It is geothermic steam drawn from the center of the earth
that powers Iceland's first and only vodka distillery (making
it the only eco-friendly vodka on the planet). Much of this
can be seen on a virtual tour of Iceland.

This hand crafted small batch vodka uses water drawn from a
lava field over 4,000 years old, that requires no treatment
or demineralization before it is blended with the vodka.
After distillation in the Carter-Head Still they filter it
through lava rock collected from a local volcanic fields
giving the vodka its characteristic Icelandic flavor. Water
used for Reyka is so pure that Volvic bottled water has a
content of dissolved solids that's five times higher than
Reyka's, Evian's level is nearly 15 times higher.