I call it the spite box. A redwood and pine sliding dovetail puzzle box I made after a friend at work told me that he didn't think I could make it. Suck
27 DIY Puzzle Box Plans You Can Make - Handy Keen
Amazon.com: DC-BEAUTIFUL Impossible Dovetail Box Mini 3D Brain Teaser Wooden Magic Drawers Gift Jewelery Box Puzzle Toy : Toys & Games