As AirTags do not have any kind attachment point, i created some mounts.
The unbelievably versatile multifunction mount includes a flat bottom for glueing or adhesive tape, screw holes for countersunk screws up to 3mm, holes for sewing onto fabrics and even 4 indents to insert tiny 5x1mm magnets.
This bad boy even has a notch for securing the Airtag with a zip tie or a small rubber band.
Cutouts for easy removal of the AirTag (use a pen).
Airtag can be inserted in either way, though i recommend having the speaker (white surface) outside.
Why so many others?
Next to the AT1_Multi multifunction holder are some other ones, if you have a very specific use case:
V1_holder: possibly the lightest AirTag holder, at 1.2 grams. Snug fit for normal environments
AT1_holder_velcro: a small, squared version which is exactly wide enough for usual 3M Duallock/velcro tapes (1"/26mm)