The Swiper - rear wiper messaging
Does your car have a rear windshield wiper? Here's an easy way to communicate with traffic behind you.. Smiles + Wiper = the Swiper. Might make it a thing if it doesn't exist yet.
#cars #transportation #traffic
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Ah - looks like it's already a thing. "Wiper Tags". Not too many options with words I guess because it would rotate upside-down partially. (?) https://wipertagstore.com/