A HOPPER is a funnel-shaped receptacle, typically used to store and dispense bulk materials such as grain, coal, or fertilizer. It is usually made of metal, wood, or plastic, and is often found in industrial settings. The term 'HOPPER' comes from the Dutch word 'hopen, ' which means 'to heap.' Hoppers are also commonly used in agriculture, where they are used to collect and store grain, seed, and other materials.