Summary

If you need a spool to keep your earbuds from knotting up in their pouch this thingy might do the trick. You first put the earbuds into the middle void while pulling the cables through the slot to the back, then start wrapping until you can tuck the plug into the middle or through the middle slot. For types with a microphone piece you might want to go through the middle slot once while wrapping in order to line up the microphone piece over the larger opening -- this can allow it to fit better. My Ulix microphone lines up nicely if I wrap through the middle once.

I use superglue gel to put the tops onto the base, but any type of post-print glue you prefer will probably be fine too.

EDIT: i replaced the tips with something more rigid, so I flared the opening more. That's the "flared" version.