Maybe something like this in ninjaflex?
Silly suggestion - put your DMS door fob in your “take to DMS” bag/kit instead of on your EDC keyring. Mine was with my little toolbox, safety goggles and ear plugs, and my “take to DMS” thumbdrive. If I got to DMS without my fob, it probably meant I got to DMS without anything to work on or with.
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How about we have a ring class so people can make rfid jewelry to wear? I really want to make a ring to hold the rfid antenna for my Tesla, but would love if it could do both my DMS and Tesla rfids (if I can fit 2 antennas). 
Anyone willing to teach me how to turn a ring or make one out of metal in jewelry? 
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Somebody made a fob ring in 3D fab once…
Except I want something pretty though. 
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Embed one of the injectable tags in resin? Or use a chip liberated from one of the cards.
I think the guy with the ring had liberated a chip… And, maybe $.25 for a fob, vs $25 or so for the injectable…
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@apparently_weird made a leather ring that he embedded an injectable RFID into. It kinda looked like a superhero ring, though, vs. a “pretty” ring.
So you’re saying superheroes make bad jewelry choices? 
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Lovely, but DMS is 125 kilohertz, while the ntag213’s are the ~13.5 megahertz.
Just a random example to illustrate the existence of premade rings, I don’t know the DMS RFID specs.
I know there are premade rings out there, but they’re usually only 1 frequency. I would need one that’s 2 different frequencies (DMS & my car). Besides, I like the idea of designing and making my own. Why buy when you can make it yourself? 