Device Details


The Cup Holder Resizing Ring is intended to reduce the diameter of an existing cup holder to better fit cups or mugs and prevent them from tipping over and falling out. The design is made in OpenSCAD and is fully parametric so that with 4 to 5 measurements, users can receive a custom sized ring perfect for their specific needs. The Resizing Ring is as simple to use as dropping into the cup holder and then placing your drink inside.

Build Instructions

Take the desired dimensions and input them into the OpenSCAD file to generate the STL. Then print the file and the Resizing Ring is ready to use.


  • 3D Printing


  • Resizing Ring


Design and documentation by Makers Making Change, released under the CC BY SA 4.0 License: