[pungo]

Originally Posted by grannyknot

Santa is bringing me 2 of these this year, I think they were designed for the Z4 even though they work on many cars.
https://www.ultimatecupholders.com/index.html

Smart choice, I've been using these in both my E86 and E39 for over a decade. Such a simple functional design, I like that you can adjust the size by simply bending it by hand and installation or removal only takes seconds.