This is a simple ice scraper. Designed to be small so as to fit on a key ring it could easily be scaled up. I have found this works really well and has been very useful for times when my windscreen has frosted over.
This prints really well using any settings however, I would advise using settings of 0.1mm layer height, infill of 20%, and a hot nozzle temperature.
I printed this in PLA but ABS would work well too.