While my wife was in the hospital, I took a rug with me back and forth to work on while on the CTA. One day I made the mistake of leaving it in "Savi land" and she decided the needle was a chew toy. I got it back, but forgot to put it with the rug.
BIG MISTAKE. We show up for her follow up apt. after discharge and... no needle. Initially I tried using a key, but the head of the key was just too fat to fit through. Then frustration and ingenuity came together, and I cut up one of my discount key fobs, and it worked. It wasn't ideal- it was a bit shorter than I'm used to, and I was always worried about giving myself a hellacious papercut, but it worked!
I love the "make do with what you have on hand" aspect of this craft!