Gregor ‘The Mountain’ Clegane is used to drink the blood of his enemies, but how does Hafthór ‘Thor’ Björnsson keep in such world-beating shape?
He stays hydrated. Really, really hydrated.
Yes, it’s an April Fool’s gag, but it’s a funny one, and has the added benefit of not appearing to be stealth marketing for any real product (yet). That said, Heavy Bubbles would probably sell quite well with the endorsement of the World’s Strongest Man. As long as it’s not sparkling heavy water.