3D printing is beginning to make it's way into creating recycled products. There are many groups beginning to test out and utilize the technology in printing objects out of HDPE and other waste materials found in our seas and on our coastlines. For one couple, as part of a project they call ProjectSeafood, they have gone on the road in a mini-van, equipped with an Ultimaker 3d printer which they have modified. They are collecting water and soda bottle lids as well as other plastic waste and then shredding down and extruding it into filament.
Read and see more at: http://3dprint.com/78948/projectseafood-waste/