Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5274658.

I've searched on thingiverse for other designs, but they seemed really empty, so I designed my own with a face to give it more of a character.

This can hold 2 sets of keys at the bottom of the cloud.

I am using round magnets with a power of N40. The slot for the magnets is 14x2.8mm which is a bit bigger than my magnets, but I squished a piece of thick paper to stay in place.