a simple protective case with space for a Moto Tag or Airtag for the Pixel Buds Pro original and 2. I used TPU to print this protective case with fuzzy skin (I used .1 for both distance and thickness) to add additional grip.

There is a mark at the back to indicate the reset button and a hole is made at the front of the case for the indicator light - though the hole is slightly too high so the light isn't centered in it. The brackets on the back are strong enough the tags hasn't fallen out from small drops (like 3 feet).

The cap shape is too round to fix the case. Use some double-sided tape or other sticky stuff to keep it attached. 

File is oriented in the direction I printed in. I used snug supports with 1.5x layer height for the Z distance. I would also suggest printing by object to reduce stringing.