Coffee is a widely consumed beverage prepared from the roasted seeds - commonly referred to as beans - of the coffee plant. It is usually served hot but can also be served cold. A typical 7 fluid ounce (ca. 207 mL) cup of coffee contains 80–140 milligrams of caffeine, depending on the method of preparation. Some people drink coffee "black" (plain), while others sweeten their coffee, or add milk, cream or artificial creamer. Coffee represents 71% of all the United States caffeine consumption followed by soft drinks and tea. Coffee, along with tea and water, is one of the most popular beverages world-wide, its volume amounting to about a third that of tap water in North America and Europe.
