Espresso is a concentrated beverage brewed by forcing a small amount of nearly boiling water under pressure through finely ground coffee beans. Espresso often has a thicker consistency than coffee brewed by other methods, a higher concentration of suspended and dissolved solids, and crema (meaning cream, but being a reference to the foam with a creamy texture that forms as a result of the pressure). As a result of the pressurized brewing process the flavors and chemicals in a typical cup of coffee are very concentrated. Espresso is the base for other drinks, such as a Latte, Cappuccino, Macchiato, Mocha, or Americano. 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, less than the 95 to 200 mg of a standard 240 ml (8 US fluid ounces) cup of drip-brewed coffee.