Have fun!

After printing it (higher resolution makes it look even nicer!), carefully cut it out with a sharp knife, making sure all excess paper is gone. Then cut a slit as marked. Make sure it's not too wide!

Carefully fold all edges. To make it easier to get a sharp, crisp fold, gently make a light, soft cut across the folding line without cutting through the paper.

Fold and glue the gray little flaps to make the corners.

Make sure to first make the corners and then glue the spiral-patterned flap over the gray flaps to secure them.

When all corners are glued and the two parts are finished, glue the larger gray flap to the inside of the other lid, opposite to the spiral-pattern.

Place a CD in the box, fold and slip the little "arrowflap" into the slit on the opposite side and Voila! You're done...