http://www.appropedia.org/Recyclebot A RecycleBot is a waste plastic extruder that creates 3-D printer filament from waste plastic and natural polymers. This component is a hopper. It contains the material to be made into filament before it enters the auger of the recyclebot. It is designed to work with the This particular hopper design was intended for composite based filament, specifically it was successfully used in creating wood based filament. The images included are from the first design of the hopper the included files are of the 2nd version.