As microwaves can heat things up so quickly, wouldn't it be great if they could cool things down as well. Soup too hot? Gotta gulp that tea down? Stick it in for ten seconds. 

Microwaves work by wobbling molecules about* so I wonder if they can stop them wobbling too. 

Molecular scientists please get in touch. We can work on transparent aluminium while we're at it. Imagine the possibilities. And an invisible suit.