Have any extra Altoids tins lying around? Yes? Realized that, in trying to put in a card, it gets stuck, and is hard to get out? Here is a simple 1 step solution to the problem.
Step 1: Step one- FINISHED
Roll your bills up in a way so that you can place the cards sideways
Place any cards in sideways.
If you have more than a few cards, simply tilt the tin slightly.
Optional: Cut down a short section of sticky notes and post it in the lid, and cut down a cheap pen. Decorate.