A hard, printable business card case, perfect for carrying around those fragile, elaborate business cards.
You're all business, on the case, and a card to boot with this, uh, business card case. Perfect for keeping business cards and things that are the same shape as business cards safe from the elements, accidental damage, and each other.
Both parts can be easily sliced and printed on a makerbot, reprap, or other 3D printer. With a bit of cleaning with a knife, the top should slide on to the bottom smoothly and stay on reasonably well.
If you're printing in natural ABS and you have a lot of contrast on your card, you'll notice that the walls are thin enough to allow you to see the card faintly through the wall of the case!
(If you're using a reprap or makerbot, make sure that the first layer of your build/raft is squished down on the build platform a bit, to prevent the build from curling and peeling.)