Ziyi: Do you drink a lots?
Me: err... Not really.
Ziyi: Then that's okay.
Ziyi: Because if you drink cola. It affected the white blood cell to fight with the bacteria for 7 hours.
Me: Ooo, then I can't drink it anymore?
Ziyi: nvm. If you drink a little bit only nvm, just make sure you don't drink a lot.