In this view you can see the money on the right where it is normally just sitting on top of the cards on the left.
This is what it looks like when it’s closed:
Yes! It’s an Altoids Peppermint box.
He says this is what he has been using for years and is only on his second box, after the hinges on the first one fell apart.
I had to ask if he carries it in his back pocket, which I would think might be uncomfortable. He said he carries it in a front pocket and usually sets it on a table when he sits down.