I accidentally bought 2 of these in a recent auction, pasting below as is what was described in the CD auction: 

Box Rebellion was previously released as an IPP exchange puzzle in 2004 by Walt Hoppe. Similar to the wildly popular 4L design, Box Rebellion is a tricky multiple-step packing puzzle with a single solution. The four identical pieces must be packed into the box but are blocked by an odd-shaped acrylic slider over the top which only allows one side of the box to be accessible at a time.  The solution includes multiple rotations.

These puzzles are extras and oddballs that have accumulated in the shop.  Sometimes when we make a run of puzzles we will have a few with different woods, etc. which are too much trouble to list individually on the website.  These puzzles are all in new condition and fully functional.

The walnut box and white oak pieces on this copy are unique from the production versions.