Slanted Cubes

Some days ago I was suggested a video short on Youtube with 4 cubes (not quite perfect cubes) and a box for them. Because I didn't find the name of this puzzle, and I wanted to try it myself, I created this one.

It is not so easy to put all the 4 cubes in the box, but it really works with the right strategy ;-)

Update 5/23/2023: I added a lid, so You can transport the puzzle safely :-)