 I'm not a physicist or, you know, I'm not. I know they exist, but... They were developed in Scotland for distilling whiskey. That's where they came from. Ah, okay. Makes sense. That way you could get as much whiskey out for as little of an energy input in as you could, because, you know, you had to boil stuff, and that took resources, coal or wood or whatever. But that's actually where the...