I see where you’re going and I do appreciate the answer. If what “a coffee” was as standard as you say, it makes sense.
But I still don’t think it answers the question because coffee can vary way more than coke can and as can human perception of what a “serving size” is. For most people, it’s whatever’s in the beverage-sized holder. On the same list you sent me, the only thing listed at 6oz is a coffee flavoured yogurt. Also, Folgers and Maxwell are definitely on the weak end of that spectrum. I’d be with you if I thought that’s all people drank or that they were as aware of comparing serving sizes as well as you are.
So, 200mg is kind of a median value in a really inaccurate comparison system, to be sure. If you asked my Mum or my Dad if Starbucks coffee had as much caffeine in it as Folgers, they’d probably think so. They also probably couldn’t tell you what a serving size is except it’s the size of whatever cup they like.
