Q:Determine the topic of the passage. "Espresso has more caffeine per unit volume than most beverages, but the usual serving size is smaller—a typical 60 mL (2 US fluid ounce ) of espresso has 80 to 150 mg of caffeine, little less than the 95 to 200 mg of a standard 240 mL (8 US fluid ounces ) cup of drip-brewed coffee." Topic:
A:
Espresso