I read that cheap alcohol can be cleaner/smoother after filtering it through activated charcoal (or a charcoal filter of some type). Assuming I would want to filter more than one bottle, which is the most frugal option? a) activated charcoal alone b) a commercial water filter cartridge c) a special coffee filter d) an aquarium/other charcoal filter from a pet store
Is activated charcoal common, or would I need to find it somewhere special?