Basically a chest that picks up items as they touch it. IE if you throw an item using Q and it hits a chest the chest will pick it up and you can open the chest to retrieve it. This could be useful for things like mob traps, garbage disposals, etc. IDK if this would work, but it seems like you could just give the chest the same picking up properties and codes as the player has.
Saw a topic about this once, wondering if anyone made it....