Any creative ideas for an empty perfume bottle?

I'm through with my perfume but the empty bottle is so pretty, i don't want to just throw it out! Any ideas?Any creative ideas for an empty perfume bottle?
Set it on the window sill so the sunlight shines thru - like a sun catcher. As you accumulate more bottles, add them to the collection.Any creative ideas for an empty perfume bottle?
All these other ideas sound great. Depending on the bottle, you could pour a bit of creamy paint on the inside, roll the bottle around a bit to coat the interior. White makes bottles look like old milk glass or porcelain. Display a few together with one or two flowers in one jar.
i would refill with another or same perfume. there's always sand art, what did u have in mind for it? colored water? idk totally up to u.
I would visit a design your own perfumer and refill the bottle.
If there is a big enough hole put flowers in it i did that with an old wine bottle its ah-dorable!