Narbaiza tells us that this project actually started out as a 3D print of the Millennium Puzzle itself and not the box the disassembled puzzle was kept it.

With [Nikolaos’s] 3D printed sliding puzzles, this will be a problem of the past! The dovetails, integrated into each piece, keep the puzzle together but still allows pieces to move.

This handcrafted puzzle box is more than just a game—it’s a brain-teasing adventure. Piece by piece, players solve clues to unlock hidden mechanisms and secrets. With intricate artwork and ...

When finished, just download the pre-made files and send them to your 3D printer. After printing, the build requires some sanding and gluing, but it's worth it if you can turn a Starbucks gift ...

As [feazellecw] says, it’s important to find a box to help keep the pieces together during assembly; a 3D-printed box would be a nice touch.