That really does look dodgy, doesn't it? How many people does it take to fill a bottle- and why the big secrecy?
Mind you, I've just been watching the show 'Midnight Mass' on Netflix- so it could be the blood of an avenging angel, and it's how he replenishes himself between points.
That's why so many players are falling ill. He gets his fix from the young'uns.
Or something.