KeyGuard Pro SL-591 Car Window Punch Button Lock Box, Black https://www.amazon.com/dp/B01FWYKGBQ/ref=cm_sw_r_apanp_zHqNIVns8JRbq

I bought one of these and it works great - and it doesn't invite vandalism.

https://www.amazon.com/gp/product/B01FWYKGBQ/