Single malt or blended, preserve your
favorite whiskeys with a preservative
spray. Photo: CanStock.

The same nitrogen aerosol sprays used to prevent oxidation in opened bottles of wine can also be used to protect single-malt Scotch, Cognac and other precious spirits. Just spray into the bottle before returning it to the shelf: The gas adds a layer of protection from oxygen for weeks and even months. If the bottle is something special you open rarely, sealing over the cap with paraffin (available at any drug store) prevents evaporation as well.