A minimalist card wallet (just add a wide rubber band) with a twist:
The top holds an Apple AirTag: The electronics in one side, the battery in the other one!
The thin cover part protects the battery and the electronics: just glue it on.
The bottom part connects to the top part via a wide flexible band. The credit cards feed in the middle…
Work in Progress... but it works already
The author marked this model as their own original creation.