Molded fiber, also known as molded paper pulp, has been used since the 1930s to create containers, trays, and other packages. Today, molded pulp packaging is widely used for electronics, household goods, automotive parts and medical products. These tools are traditionally made by machining a metal tool in the shape of a mirror image of the finished package. Holes are drilled and the vacuum is drawn through them while a screen prevents the pulp from clogging. This process costs about $30,000 and takes two weeks to make a metal tool for a larger package. 3D printing helps eliminate the need for expensive machining and automatically builds the fine holes necessary for effective vacuum draw in paper pulp molds.