. Well-Insulated Espresso

"Cappuccino" means "hood" in Italian, which is why the mafia drink them (see Grand Theft Auto 4, Chapter 17, 'A Froth in the Family'). Named after an order of Franciscan Minor friars, the "Cappuccini," and their brown hoods, the foam on top of the cappuccino acts as an insulator and helps retain the heat of the liquid, allowing it to stay hotter longer.

For world fame amongst the geekiest of baristas, take your closet talents to the World Latte Art Championship in Denmark.