I have decided to pack these up in a small ziplock bag, together with the SAO leash (kind of a small lanyard for this tiny badge, and an extra security if it should fall off a badge).

I have labeled the bags, with information and a QR code linking to this project (via short url).

One of each in the bag, and then close if up.

As programming these can be done via the "radio" interface, I simply used an Android device running the TagWrite app to first format and then program the tags to hold a URL.

Having the tags formatted as NDEF, allows iPhones to also use these. TagWriter is also available for iOS, but it won't do the initial formatting of a blank tag.