[TOMT] [Movie] Horror movie about a body getting put into a box

So there was a horror movie that was suggested to me once. Always told myself that I would watch it someday, never did. Forgot the name. So here we are.

If I remember correctly it was about a mad man/doctor putting a cut up body (a woman’s?) into a box. The movie’s title sounded similar to Jennifer’s Body. I think it was the name of the woman + Box (or a word similar to it). So probably [name]’s Box.

And I think the movie cover depicted the mad man lying on the box like it was a bed or something.