“Does filtering cheap vodka through a Brita filter really work?”
http://chowhound.chow.com/topics/474541
Sobieski is mentioned in the comments and mentioned here, too. I don’t drink much anymore but I’ll have a vodka tonic with lime every now and then, I’ll have to try it if it’s even available in the state run liquor stores here.
I can’t believe I just spent about 45 minutes reading this link. Great information on it.
Currently Brittany filters contain ion exchange media. This filters out the ethanol. Takes out about 25% per pass.
You have to use just activated charcoal to not pull out a large % of the ethanol.