Ukulele Humidifier

I recently acquired a ukulele, and, being a guitar player, I knew that humidity (or lack thereof) could damage an instrument. With this in mind, I decided to take a shot at designing a small ukulele humidifier.

This should fit any sized-ukulele. It could probably also be used for other acoustic stringed instruments like guitars or basses, but YMMV.

Aside from the printed parts, you'll need a small piece of sponge to put inside.