You can use the same Windshield in winter and summer (I did many years). When it is used from outside, it helps even more against the temperature.

It is a bit more fun though, to use one with big eyes to be positioned inside and make your car look like from Cars movie. Example on Pinterest

We have the red version (strangely ours was much cheaper here in Germany than what I just found on Walmart website) in our little red Toyota and aside from keeping the car cooler it is looking really cute.