Yes, I know what you mean. I lost mine about five years ago. Might have been while getting a chest X-ray. You might think the hospital would have called me since they had my name on them. Then again, maybe not, as I had major surgery two years ago and they said I was type A-. Since that is what they put into me, they must have been correct. Wonder who the dumb corpsman was that mis-typed me. Feeding you with the wrong blood type will kill you.
Still wearing mine. Less obvious than war paint.