Hmmm..seems to me that you need to look into the engineering of a proper bong, vicstar lol
It is easy to filter a pipe, without blocking it - how do you think that coffee perculators work?
Plus, you can always pass the Vodka through another filter before pouring it into a glass (like, an empty tea-bag, for instance).
Trust me, the taste is awesome - like fruity-grass flavoured Vodka..yummy!