I got arrested for about ten hours by Chinese Military Intelligence last year. They were nice guys and it was an interesting experience but that's another story.
Today's story is that they've got a really slick way of protecting a CD. Just put it on a piece of paper and fold the sides as shown, making a pentagon shape. I've been doing it like that ever since. Unlike normal sleeves and cases, it'll shed dust from most angles. I don't know if it's the product of an intensive research program or informal ingenuity, but it's a damn fine trick.
Fully biodegradable to boot!
The one in this picture was folded by an actual Chinese Military Intelligence Interrogator!!