The problem with this is that it hard for your to shift if its in the way.
Go to any junkyard and find a early 90's model ford taurus and they have those exact cup holder and depending on where you go they run between $5-$20 dollars.
the problem with using the the ash tray as the cup holder is the bump where the E-brake is grounded is in the way. I find that a annoyness to me cause i buy the bigger size drinks and it in my way of shifting and i shift around.
The OEM armrest is kinda high for me and i hit my drink and my arm continously hit it.
I know im never happy.
But i perfer either using the ash tray or putting it between the seat and the door.
I say do it and let me know i might buy one