People maintain driving with a cellphone doesn't distract them. I decided to see if that was true. I thought and thought about what I could do to prove it. Then it hit me. If I put something on my car roof, I could see if people notice. I decided a coffee cup was the best choice, and after consulting my friends, they said to go with a StarBucks cup w/attached "cup condom". I did , and the reaction was good enough for me to give the cup its own Twitter feed( twitter.com/RoofCoffeeCup ), where I jot down what people do while driving, then Tweet a recap later. It's hilarious because I can be driving at 65 miles per hour, and people don't consider how a cup could still be on my roof. When I take turns in front of them, and the cup doesn't move, they still tell me. Even at stop lights, when people get out of their cars and try to take it off, some people don't figure out it's not real.
With how hard it is to keep a straight face because I'm laughing so hard, I knew I couldn't keep the fun to myself. I also wanted to see the RoofCoffeeCup spread out from the small area of New Jersey I drive, and go across the country. Thus, I'm making my first Instructable. All I ask is that if you do make a RoofCoffeeCup, please tweet what reactions/where your cup is using the #RoofCoffeeCup hash tag, so we can all share the adventures.
Now some "legal" stuff. Even though the cup weighs 3oz, the magnets used are hard, and could damage should it fly off, and someone is tailgating you. Check your local laws before attempting. The magnets I use are stronger than the ones on those "tear-drop" lights some people put on their roofs, and this cup is lighter than those lights, so if those lights are legal, I don't see why this isn't. I take no responsibility for anything that happens to you if you try this. I'm only responsible for when I do it with my own car. I'm not responsible for any damage to your car through possible scratching or dents if you drop it close to the car. Don't be a hazard to others on the road. The reason I went with a coffee cup is it's not that out of the ordinary, and it's not a danger to anyone, like if I attached a laptop or something else heavy. It also will not cause a panic/calls to police, like doing this with a baby carrier or car seat would, which I DO NOT endorse trying.