I had several bottles of body splash and cologne that I didn't care for (gifts from well meaning friends). Instead of throwing them out, I use them as bathroom air freshener and stinky shoe deodorizer.
Great idea! I have really bad allergies so I don't use cologne. My dil gave me some really nice cologne in a pretty glass spray bottle and I used a small spritz in the bathroom on the way out the door and it was lovely. I doesn't smell strong enough to bother my nose and it is put to good use.