ikea hacker: Put a cat litter box at the entryway?
http://ikeahacker.blogspot.com/2009/05/put-cat-litter-box-at-entryway.html

http://www.ikea.com/us/en/catalog/products/40134050

The first thing that comes to mind - "No way!" Kitty's poo-poo palace is not the best thing to greet you the moment you open the door and ... what about the smell? But as we see, hackers have found a way to cleverly disguise litter boxes. Here are two, that can make an entrance to any landing space.