As a proof of concept, it seems as though this machine was made from repurposed plastic, but it could also be made using whatever filament you happen to have on hand. As far as recycling goes ...
This has led to some people looking to alternatives for standard filament, including recycling various forms ... What sets this machine apart from others is that it’s built around an Arduino ...
PETFusion 2.0, a PET Bottle Recycler that converts them into 3D printing filament, has launched onto Kickstarter and quickly met its funding goal.