My comment above was in response to what you said before the edit. Just in case it's confusing.
It's hard to estimate how much caffeine there is in two cups. Too many variables. It can be as low as 100mg or as high as 300mg. Coffee is awesome and it helps at work. I have 2 cups daily on a consistent basis. Even weekends.
Is there a point to still take creatine?
No problem. I have a bad habit of writing stuff, then changing my mind.
That article called high caffeine 450g. I don't think 2 cups would count as high but they don't really define it well. Maybe that's why I never had much effect from creatine.