The one in the photo is printed with CF PET-G from Prusa.
When printed, just snap in the Airtag and its held snugly.
Best printed with a 10mm brim with the flat top facing the print bed. When placed like this it doesnt require supports.
If you like the design, you can buy me a coffee here: https://www.buymeacoffee.com/kazikg
Encountered any issues or have suggestions? Feel free to leave a comment below. I'm here to assist and continuously improve this design. Your feedback is invaluable! :)