MoDiP houses three distinct collections: the MoDiP collection, consisting of predominantly 20th and 21st century mass-produced artefacts; the Plastics Historical Society collection, which includes examples of the very-first man-made plastics; and the Worshipful Company of Horners collection of artefacts made from horn, a natural plastic. Together they amount to more than 10,000 artefacts and  provide a comprehensive history of the use of natural and synthetic plastics in design.