I wrote an answer to this on Quora, and said my money was on the Bed. However, for a really good Cold War, you got nothing else better than the refrigerator. It can conduct Cold War negotiations, without budging an inch from its position, as you know if you’ve tried to move it to clean under it. It has numerous bins and drawers to store secrets. The Broccoli Police are everywhere. Hide ice cream behind them, to keep it safe, and use it for exchanges of prisoners later. If it has to escape from constant interrogation and examination of it’s secrets, it can run, and run constantly. Such endurance. If it should be taken prisoner, and have no power, it can put up a real stink.