A microwave!

It's a machine that vibrates water molecules with electromagnetic waves to heat them up.

Electromagnetic what?

Molecules?

For example, this cold yakitori.

Hey, what are you doing?

If I put it in the microwave...

Ding!

Here!

It's warm again!

That's so convenient!

I'll give you a discount if you buy it now.

You get more than you pay for!