I have the Ram mount one. But I use it mostly to temporarily hold things. I used velcro to hold the insulator in so it doesn't blow out.
I've had others that are better for me at holding drinks. The problem for me with the Ram Mount version, it is too short. So when I get a tall drink, it tries to invert because most of the weight is above the pivot point. Yeah, I could modify it, but I've been lazy about it.
I had a Butler on my Wing, but they are so expensive.