A popcorn maker (also calle popcorn machine) is a device used to pop popcorn. Commercial popcorn machines are usually found in movie theaters and carnivals, producing popcorn of the oil-popped type, which has approximately 45% of its calories derived from fat. Hot air popcorn poppers appeared for home use in the late 1970s, which produced popcorn with only 5% of its calories derived from fat.