I keep mine within the pages of an ACLU printed pocket constitution, and it's just about the perfect size for the front pocket of my computer bag.

I believe it will also serve an additional purpose eventually.

Should I be asked for it (and I was vaccinated literally on the first day possible, then a month later), I will pull out my pocket constitution. No doubt, people seeing that will be instantly filled with the fear that I'm preparing to go off on a constitutional rant, and when I don't they'll be so grateful they may process me instantly, and without any other concerns.

Thank you. It is annoying.