Australian technology, software and hardware reseller Redstack decided to see if they could find a way to incorporate a cup holder and a smartphone holder into a classic Mustang without ruining the look and feel of the original design. They started with Autodesk Inventor and created a final design that would use the ashtray recess as a mounting point. That would allow the custom drink and phone holder to easily be secured into place, and removed quickly. Once the design was finalized the Redstack team printed the device out on a Ultimaker 2 3D printer in a high quality ABS material for durability. You can read more about this innovative use of 3D printing technology over on 3DPrint.com: http://3dprint.com/112585/accessories-for-classic-cars/