I wonder, do companies like Starbucks or Dunkin Donuts consider the flavor variable introduced by the paper cup they choose to use when serving beverages? I know from experience that, in my opinion, Starbucks coffee is served way too hot for paper cups. Even with a paper sleeve, it has to be close to boiling point. Since I already dislike Starbucks coffee, this is not a point in their favor. Though I guess the flaming temperature of their coffee does make sense since it tastes burnt.
Here is a picture of paper coffee cup taste tester.