You can make inexpensive vodka taste as smooth as a top-shelf brand with a few easy maneuvers.
You Will Need
Step 1
Pour vodka into a water filter pitcher to remove impurities, just as you would with water.
Step 2
When all the vodka has dripped through the filter, pour it into a clean pitcher and then put it through the filtering process again. Repeat at least three more times, for a total of five. Then chill and enjoy.
Step 3
If you don’t have a water-filter pitcher, put two inches of food-grade activated charcoal into a three-quarters-full bottle of vodka. Put the cap back on.
Find food-grade activated charcoal at home-brew supply shops or online.
Step 4
Shake the bottle for a few minutes every day for a week. Store it in the freezer at night and at room temperature during the day.
Step 5
After a week, separate the charcoal from the vodka by pouring it through the colander. Chill the filtered vodka in your freezer for several hours before drinking. Even the least expensive vodka tastes better when it’s cold.
We can offer you some of the products needed to pimp your vodka:
Mesh colander (strainer): http://bit.ly/A2kzC
Bottle: http://bit.ly/2NmjKd
How To Turn Cheap Vodka Into the Good Stuff. Shared by Howcast

Or you could just add tonic water, a slice of lemon, smother the taste and save yourself all that carbon grief.
That might hide the taste, but how are you going to feel in the morning?
That’s a different issue entirely…you’re not going to filter out any methanol contaminant using the above approach and it’s methanol that gets oxidised to formaldehyde which can cause some of the symptoms of hangover. The other alternative is simply not to drink more than a glass or two in a session…surely?