I too have a couple similar to the Amazon ones that I got decades ago for our Explorer and F-150, but rarely use them because they fit sloppily, and add height to the whole holding attempt. Cups, especially taller ones they’re meant to help hold, kept lopping over holder and all. Shorter mugs with handles with a lower center of gravity work better, esp. with the handle slots. But anything you set in there tends to make the built-in holder’s bottom just that much higher, so it needs to fit snugly.
The clean-out adapters sound like an idea, and handle slots could be cut in them. Thumbs up, Larry.
Joel
