Stacker?
Contractor: “Yeah, it allows you to fit twice as much furniture into the room. By stacking it, of course, you put the entertainment center on the couch… the chairs on the table… etc. You leave an empty spot, so when you want to use some furniture you can unstack what you need and then put it back when you’re done.” Bill: “Uh… I dunno… issue two. The second issue is the light fixtures. The bulbs we brought with us from our old home won’t fit. The threads run the wrong way.” Contractor: “Oh! Thats easy. Those bulbs aren’t plug and play. You’ll have to upgrade to the new bulbs.