Type C coffee in the United States refers to a specific grade of coffee beans that is commonly used to make coffee drinks with lower caffeine content. Its name "Type C" comes from the hierarchy established by the International Coffee Organization, which divides coffee beans into three categories: Type A, Type B and Type C, of which Type C beans are beans of inferior quality. As a result, C-type coffee beans are relatively inexpensive and are often used to make affordable coffee drinks.

Type C coffee beans are typically blended from multiple geographic regions, including Brazil, Colombia, Vietnam, Indonesia, and more. These beans usually receive less attention and delicate handling during picking, handling and roasting, and therefore fall short of high-quality coffee beans in terms of taste and aroma.

Despite their lower quality, C-type coffee beans are still an important product in the U.S. coffee market. Many manufacturers of instant coffee and coffee drinks use C-shaped beans as the main ingredient, and these products are often sold in convenience stores, fast food restaurants, and hotels. Type C coffee is also widely used in coffee brewing machines, vending machines and other large-scale coffee production equipment to meet the needs of speed and economy.

It's important to note that despite their low price, C-type coffee beans typically contain a higher caffeine content. This means that while type C coffees may be more affordable than high-quality coffee, they can cause problems such as physical discomfort or insomnia, so coffee drinkers need to choose carefully. In addition, from an environmental point of view, C-type coffee production produces large amounts of coffee grounds that need to be properly disposed of and recycled to reduce environmental impact.