Home made air freshener using Soda Bicarbonate (or baking soda) and few drops of fragrance essence such as lavender. Poke few holes on the jar lid and decorate accordingly. The soda bicarbonate helps to absorb smelly room and is totally safe to use. I keep one in my car, room, toilet and even inside the refrigerator. Make a few as Christmas gift to freshen up the hall/room.