So, naturally, I had John cut it in half and hang it on the wall.
The space inside is perfect for perfumes and body sprays - and you get two shelves for the price of one box! (Mine was $4. Not too shabby.)
For extra usability, add cup-hooks to the bottom of one or both shelves:
To do this yourself, just find a small wooden box or high-sided tray. Cut the box in half using a miter or jigsaw (or even a hacksaw, if you don't like power tools), and then attach heavy-duty picture-hanging hardware to the edges, like this:
Plus, talk about instant gratification: you can be done in under 30 minutes. This would also be a great way to organize toiletries in the bathroom, not to mention help get them all off the counter and toilet tank. (Or is that just me?)
I hope this helps inspire some crafty ideas out there!
[UPDATE: Katphoti in the comments just mentioned another great idea: flip the shelf over so the bottom becomes the top! This would make a perfect display shelf when the sides would otherwise be in the way. Brilliant!]