We are a small Australian business that makes sunshades to fit individual models of cars for use in every-day motoring. They are made from reflective polyethylene foam and span the tallest of windscreens without problems. For the front windscreen they are supported simply by the sunvisors. We also make sunshades for rear and side windows that don't require suction caps for support. They either just press into place or have an unobtrusive magnetic support.