The first Espresso machines were introduced in Italy at the beginning of the 20th Century, by Luigi Bezzera, who invented a steam pressure system. In 1938, Cresemonesi introduced a piston based espresso machine.
A Barista is an expert in the preparation of espresso-based coffee drinks. Top Baristas compete annually in the World Barista Championship.
A single shot of Espresso has about 185 mg (2000 mg/L) of caffeine, while a single cup of coffee (about 200 mL) has about
115-175 mg of caffeine.