Sun screens for side windows: recommendations?

For occasional use on a side window by an adult… there are ones that adhere to the glass, ones that roll up and down, etc. What has been your experience and what do you recommend?

when the kids were little, we had the roll up and down ones in the minivan. seemed to work well and they can be removed easily.

I’ve used the type that sticks to the window glass on the inside w/ little suction cups. They work pretty good at shading. They eventually deteriorate and have to be thrown away, but the suction cups can still be salvaged for other uses, so not a total loss.

Just for fun while drinking coffee I looked at sunscreens for vehicle on the web . Those things are so cheap that even if I did not like it I could just give it ti Goodwill the next time I go .