
Included below is three different designs for PET bottle shredders currently designed for 20oz soda bottles but easily expandable for use with 2 liter soda bottles. The first design is a simple hand held shredder which is the simplest design and uses the least plastic. This makes this design ideal for areas which have access to a 3D printer but which filament might not be as readily available. The second design adds a bottle holder to the simple hand held shredder. This holder was added to possibly aid in efficiency. The third design is a hand cranked design which also uses a bottle holder and spools the cut filament. These shredders allow the use of the cut PET to be used in things like crafts and possibly for printing purposes.


Files:
Print time: 2 hours for simple cutter at 20% infill
Assembly time: amount of time it takes to attach razor blade, approximately 2 minutes
The cutter slots may not print fully open and will need to be trimmed with a razor blade. Cutter slots may not also print with even opening spacing.
Hand cutter:
Commercial equivalent:
| License | CC-BY-SA-3.0 |
|---|---|
| Organizations | MTU, Michigan_Tech's_Open_Sustainability_Technology_Lab, MY4777 |
| Cite as | Kemyszka (2014–2025). "3D printed PET bottle shredder". Appropedia. Retrieved October 3, 2026. |