If I had to have anything like that, it would have to be in the form of jewellery I liked and would be happy to wear 365/365 24/24. Hence since silver sends my skin black it'll be gold. Can't be a bracelet, as I already have a chain one I wear all the time and my watch on the other wrist. Also got a lovely gold bangle that I haven't worn for ages - must try to remember to! and not enough fingers for the different rings I wouldn't wear the same necklace every single day since I don't wear the same clothes every day! - Jewellery is worn to embellish one's appearance and even if it also indicates eg engagement and/or marriage, you'd never spend money on something you didn't like enough to wear constantly, now would you!
Of course I've only had Type 1 diabetes for the 50+ years so far and needed a paramedic the once when I couldn't communicate with anyone and he discovered pdq why, ie my BG that low his meter wouldn't give him any reading so instantly set up the glucose drip he'd already got in his bag of tricks and carted off to A&E, by which time I could communicate anyway and after nearly an hour sitting on a chair alone in a corridor till husband got there after which I tested my own BG - now in the teens, so husband got a nurse, asked her to remove said drip (else he was going to anyway) and I discharged myself. Never saw a doctor - major accident on motorway, all available staff dealing with that and they'd evidently decided without bothering to even look at me that I wasn't urgent. Who knows - cos I certainly don't!
Happy to continue to take my chances so far. (just in case there was any doubt about that!)