Cologne as Air Freshener
If you have a bottle of cologne or aftershave that you no longer wish to wear, you can always use it as room freshener in your bath or powder room.
If it is already in a spray or pump bottle, use it as is. Better yet, if you can get the top off the bottle, add some water to increase the amount. You will have a free air freshener spray and skip the propellants in commercial sprays.