Seemed like an appropriate thread hijack, considering the desire for economical adult beverages....
If you like premium vodka, but don't like shelling out big bucks for Grey Goose, Belvedere, etc... Then all you need is some activated charcoal. The key is contact time - so you have to rig up something with a very slow drip. You can get the charcoal at Petsmart. Best to get some of that cotton like wadding, too, to keep the charcoal in place.
I have done this with the cheapest shwill, and was surprised at the results...
Mylo