The significant stimulation of a tiny shot of espresso

espresso machine
Originally uploaded by adamknits.

Espresso (Italian) is a concentrated coffee beverage brewed by forcing very hot, but not boiling, water under high pressure through coffee that has been ground to a consistency between extremely fine and powder. It was invented and has undergone development in Milan, Italy since the beginning of the 20th century, but up until the mid 1940s it was a beverage produced solely with steam pressure. The invention of the spring piston lever machine and its subsequent commercial success changed espresso into the beverage we know of today, produced with between 9 and 10 atmospheres of pressure.

Wikipedia.com