Boutique coffee which kind of coffee has the highest caffeine concentration?

What is the beverage with the highest caffeine concentration? Some people say it's Espresso, others say it's iced coffee-all wrong! Today I officially experienced the scary Cherry Bomb-the dried Geisha fruit brought from Panama, brought back by Robert, the boss of Kaffa, to give me a try. Geisha dried fruit looks like dried longan and smells like dried longan. How would you like it? The answer is to soak a little bit of hot water like flower and fruit tea and you can drink it in a few minutes.

While drinking excitedly, Robert suddenly said half-jokingly, "I think this thing has a high caffeine content." If you think about it, if this sentence comes from a population that has tried 500 beans in Kenya in three days, it doesn't seem to be a joke. Just thinking about drinking for about ten minutes at the same time, my chest began to feel a little stuffy, my heart beat faster, and I felt a little dizzy. Robert looked at me and smiled as usual, obviously I had only drunk 15 cc, less than a small bottle of Yonle! I was drowsy for the next four hours, and now my chest is not feeling well (it's been five hours!). One of the things I've learned today is that tasting fresh may not be a good thing. If you think I'm cheating, you might as well try it yourself, or give it to an Olympic guest who always thinks that the coffee is not strong enough, and make him drink a cup and fly to the sky. But you have to bear the consequences. Hey!