Terracycle’s mission is the ability to recycle everything, so I reached out and purchased the medium box (11”x11”x40”). The box has a prepaid label, so once it is filled up with used support, material, and models I no longer need, I just mail it to Terracycle and they do the rest. To find out more and purchase a box of your own, see https://www.terracycle.com/en-US/. Terracycle has partnered with some manufacturers so you can recycle some products for free, such as Colgate®toothbrushes.