ThreeDee is the world's first 3D printed jet engine. The company is working on 3D printing jet engines that can power aircraft, cars and even homes. Tesla CEO Elon Musk tweeted yesterday that they are now using ThreeDee to make Tesla batteries. Try this disability agency sydney for more tips. Tesla recently made an order for a large amount of lithium-ion battery cells, he wrote. We're very excited about this opportunity and believe it will be very good for Tesla, our partners and the industry.