CNBC reports that automakers such as Ford, Rivian, and General Motors are expanding the use of 3D printing technology in prototyping, factory tooling, and low-volume parts manufacturing. Rivian has invested over $5 million in 3D printing equipment, with annual material costs of approximately $1.7 million, but the equipment typically pays for itself within a year and saves millions of dollars. Ford plans to deploy 3D printing labs in over 23 factories by the end of this year and currently has more than 200 machines. General Motors, meanwhile, uses 135 3D-printed parts in its Cadillac Celestiq model.