Phone - cup holder adapter

Using your phone in your car has almost become a necessity, for better or worse. Naturally, the accessories industry has come up with a plethora of adapters and phone holders. But what if you are in a car that you use only temporarily, where you can’t install a holder permanently?
Enter the phone – cup holder adapter. This contraption accepts a phone – in this case a Samsung Galaxy S5 – and fits nicely into a standard, 65mm diameter cup holder.
You can find the files for printing this on Thingiverse.