In Fallout Shelter, when you reach 100 dwellers you unlock the Nuka-Cola bottler. the description says:
ASSIGN DWELLERS HERE TO PRODUCE NUKA-COLA!
But after I built it, I seem to only be getting food and water. I've had it for quite some time without getting any Nuka-Cola, and was wondering if it actually produces it. And if it does, is there a way to increase the chances?