Obviously, @Bear has the greatest use of Altoids tins ever, but I thought some of you might like this idea as well. Just a heads up that credit cards, cards like social insurance ( for us Canucks) cards etc all fit neatly into an Altoids mint tin. Now, I don't know if it prevents RFID readers, but for me it's a great way to stow all those "loyalty" cards and stuff I don't carry everyday but occasionally need. Added bonus is...it looks like a can of Altoids. I did find that on some cards I had to clip the corners back just a bit, to make them easier to get out. What else do you use these tins for??