I didn't mean to imply that you were trying to sell them, Dr. Smith, and even if you were, that would be great! I'm just the kind of person who can't even manage to have things like pens or business cards on me when I go out anywhere, so I thought it would be unlrealistic for me to try carrying these.

I just thought that starting the thread would be fun, and bring out a lot of answers, both highly individual ones and universally applicable ones.