Ever since reading "Papillion" I have a hard time looking at pill fobs without thinking "Eeewwwwwww!"
Before heading off to prison the main character was advised to get a large pill fob to smuggle stuff into the prison. The method/location of smuggling said pill fob is left to your imagination.
-Blast
We called it a prison wallet. We also called the x-ray tech that caught most of it, the keister bunny.