ok it was my mission to try all the cheap china cupholders and am happy with this one.
it clips through the vent (comes with three selectable clips) doesnt rattle is removable
and good enough. imo.
you can recognize it on alibaba if you look though enough of them.
my ideal one would be one that is friction anchored in the pocket for the key.. I might try doing a 3d printed attempt for fun.