Injection molding is the most cost-effective way to make a plastic part at scale. The process involves injecting molten plastic into a mold and then ejecting the solidified part. This process can be quickly repeated hundreds or even thousands of times. The repeatibility of this process helps to amortize the cost of the mold across teh production run, driving down the cost of each unit to a few dollars or less. This process offers consistent quality across every part due to the fact that the same mold is used for each production run. Injection molding also has the highest variety of materials, colors, cosmetics, polishes, and surface textures when compared to CNC machining or even 3D printing.