The Pencil Holder's silhouette is the result of a simple maneuver: overlaying two circles and extruding them. The magic, however, arises from what happens within. 
 
The outer container - crescent-shaped, lower-set - revolves around the center container - tall, monolithic. This movement by itself would be enough - how often, after all, do you see interlocking 3D prints that slide smoothly within each other? 
 
But we resolved to take this pencil holder to the next level by including a secret compartment. It's part homage to the secret compartment mania of the 1800s, part tribute to the possibilities of spaces-within-spaces. No one but you (and perhaps a trusted confidant) will ever know it's there. 
 
Complete product overview here.