At a certain point in time i carried a distinct coin with a scratch mark i made on it so i can flip it and see if i could make it fly (i was heavy into lucir dreaming at the time lmao). Its mostly influence from inception, u can get the same result from just counting your fingers, they look super weird in dreams😭

Leaving aside points about driving licence numbers being unique or whatever, it would be the silver pentagram that I made back in the '90s and have worn (or occasionally carry in my wallet etc, when the cord breaks) ever since.

An old silver pendant that used to be my mother's. It has a simple yet iconic design, people often notice it and make comments on it.

Nail clippers. Got them originally to help with a bad habit of cuticle picking, but I've learned they're weirdly useful. They can cut things in a pinch and no security check gives a shit about them unlike a pocket knife.

An arch lighter version of a zippo. It fits in traditional zippo cases so I have a collection of shells that I change out to fit the mood. The current one is matte black with a cthulhu theme in brass but normally I use the mercury glass with bones and flowers. My wife calls it my zappo.

Also the severed finger of an elf.

My daily carry bag always includes my Kindle, my cribbage board, and dog treats.

I've started carrying a fountain pen rather than a typical ballpoint. I think the writing experience is a bit more pleasant.

Nothing anymore. But from age 18 to mid 30s I kept my busted up old guitar pick in my wallet.

It had seen way too many shows, and it was brittle as hell. It’s in a shoebox with since other memories now.

Less unique, I carried around phenergan pills in my pocket for about 10 years. I’d had an episode of an unknown something setting off a reaction with my throat closing up. Urgent care gave me the tablets when I left the hospital and I couldn’t not take them everywhere with me for a long time.

I have a 3d printed fidget slider and a custom-made worry stone I almost never leave the house without.

perspective

Can you clarify what you mean by "unique"?