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After reading a post on Gizmodo about a researcher who sent a student riding through college campuses dressed as a clown riding on a unicycle, and how he found people who were on cell phones/using electronic devices were 50% less likely to notice anything unusual happening, I got an idea. 

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. 
 
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Step 1: Materials needed:

1 Coffee Cup, paper variety
1 Coffee Cup Lid
1 Coffee Cup Condom/holder/ sleeve
3 Hard Disk Drive magnets
1 piece of scrap plastic to mount magnets to
Lacquer
News and/or packing paper
Glue

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triumphman says: Mar 5, 2013. 6:31 AM



I did this years ago! A guy followed me till I stopped. Then he got out and told me I had a cup of coffee on my roof of my truck. I showed him the magnet inside. He got so angry that we almost got into a punch-out! Guess he had no sense of humor! So beware, this can cause strange reactions in humans.
Wazzupdoc says: Aug 19, 2010. 6:06 AM
I like the magnets I get from dismantling discarded microwave ovens. There are two big, strong round ones on the magnetron that might just fit inside the cup.
triumphman says: Mar 5, 2013. 6:14 AM
BE REALLY CAREFUL ! Microwaves have a large capacitor that boosts the voltage up to 10,000 volts and much more depending on the wattage of the unit . A repair technician was instantly killed when he grounded himself to that capacitor. They can be discharged easily. But I don't recommend messing around inside a microwave unless you are a profesionally trained technician. FYI.
gitemstevedave (author) says: Aug 19, 2010. 9:48 AM
Well, it's a lot easier for me to get the magnets from hard drives. I can buy old ones from the flea market for ~$1. Plus, if you need to literally destroy a HDD, there is no better way than handling the platters, then scratching them with a awl or something.

But I will keep my eye out for an old microwave for exactly this reason, and see if they are stronger than the HDD magnets.  As it is, even a small HDD magnet can hold up at least 2.5 lbs, as shown in the pictures of a RoofCellPhone.  The picture with the weight is only being supported by one of the magnets.  I didn't go heavier because those magnets were just attached with plain Elmer's Glue.
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degan says: Oct 21, 2012. 6:53 PM
http://www.youtube.com/watch?v=jrL-23ADfBE

If you think this is cool, I created an entire game out of this. I try to see how many points I can get by people idiotically pointing at the cup on top of my car. Greatly named, Car Cup.
shootr says: Mar 29, 2012. 12:52 PM
Rookies...Years ago we had an old gas pump handle with about 8" of ragged hose connected. We drove around with that hanging out of the filler neck all the time.

The best is when we would start yelling at the Circle K clerk and burnout - hoping he/she saw the nozzle hanging from the truck.
cchurch1 says: Jan 30, 2012. 4:55 AM
A coffee cup is cool, but do you know what would be EPIC? A BABY CRADLE!!! Some with no sense of humor might not see the comedy in that however.
zack247 says: Dec 24, 2011. 11:09 PM
the day i get my car im doing this :D
it could be kind of entertaining to do with say, a cell phone, but perhaps have it "resting" on the edge of the trunk lid :3
id do it with a dummy phone though, you never know if someone would be "courteous" and walk off with your $250 smartphone.

nonetheless, i LOVED reading this. just think of all the things you could up ontop (or maybe even on the side) of your car!

PS: you could do it with a laptop if you took all the internals out and just used the shell ;)
kcls says: Jul 1, 2010. 9:58 AM
I live around the NY/NJ area, and saw a car with a coffee cup on top the other day. I reached out to see if it was stuck on there with magnets. It wasn't, and then the guy who's coffee it was walked up behind me and said "What are you doing?". Quite embarrassing! Great 'ible, though!
randomray says: Jul 17, 2011. 7:06 AM
Oh man , I would have thanked you , I hate it when I leave a cup on the roof .
gitemstevedave (author) says: Jul 1, 2010. 1:20 PM
That's so sad! I always thank people for letting me know and the cup usually says thank you to people who try to save him.
Macworldwizardz says: Sep 12, 2010. 11:05 AM
Dude, why couldn't he just thank you????
gitemstevedave (author) says: Sep 12, 2010. 5:37 PM
He's a cup...
RedSnertz says: Feb 12, 2011. 3:17 AM
Best way to separate the magnets from the backing:

http://www.instructables.com/id/How-to-separate-the-Magnets-from-an-old-harddisk/
Macworldwizardz says: Sep 12, 2010. 11:03 AM
Wouldn't Super Glue work too? You can just superglue the cup on to the car, but you'll need a solvent to remove it. Wouldn't it work? Oh, and by the way, NICE instructable. I am thinking about doing this to my mom and dad's car next April...
neivadan says: Jan 21, 2010. 1:11 PM
that cool now i can finelly enjoy coffie up my roof
Yerboogieman says: Jun 29, 2010. 7:53 PM
I'm pretty sure you have to be 13 to sign up for this site. Now go get your mommy or daddy and have them shut off your computer.
ecuadoriana says: Nov 19, 2009. 1:31 PM
This is a very funny idea! Somebody mentioned using a woman's purse. I have one up- how about an infant car seat with a doll inside!!!!!!!!! THAT would make people sit up and take notice- or, on the sadder side, maybe not!
cap001.bmp
Javin007 says: Dec 23, 2009. 8:39 AM
The car seat is a very, very bad idea.  You could actually cause accidents, absolutely FLOOD the 911 system with bogus calls, and potentially be arrested.
seabananers says: May 16, 2010. 9:49 AM
and if you go under (get ready for something you've seen on tv) a low bridge it could fly off go through there wind sheild and kill them (ok maybe not the last part)
denotsKO says: Nov 20, 2009. 3:03 AM
Read this book to see just how close we are to life imitating art ;)

http://www.randomhouse.com/doubleday/palahniuk/rant/
darkdark says: Nov 23, 2009. 11:42 PM
 This was my exact thought
chuckr44 says: Feb 16, 2010. 5:23 AM
You can get strong magnets from an old hard drive. Simply open the HD case, poke around with your metal pliers, and you'll find them when the pliers stick to them. There are 2 magnets, at the base of the read/write head.

My magnets are so strong they can open my full-size fridge door, like a door handle.

stephenniall says: Feb 15, 2010. 5:38 PM
I think a dalek would look good on my roof
Chrisdalton says: Feb 4, 2010. 7:58 PM
I think it would be cool if you put a spring or something on the bottom of the cup (in a way so that it cannot be seen) so that when you turn or stop the cup leans and looks as if it were about to fall over but once the g-forces return to normal it goes back upright
Crayola Crayon says: Jan 18, 2010. 4:41 PM
       I just finished mine today, and am very happy with the results. I took it for a test drive around my neighborhood, and  down some big streets, and oh man the looks and gestures I got were HILARIOUS! I had one guy practically running from his parked car waving his hands and pointing while screaming his head off, I was just trying to not crack up :D  

                                                Thank You for the great instruct-able!
Jakeg says: Jan 6, 2010. 3:24 PM
HI,
          I have one question, How did you get the hard drive magnets removed from there mounts? Also I wanted to say that it would be funny if you put brown liquid in the cup and let it slosh around, THAT would get some funny looks LOL!
gitemstevedave (author) says: Jan 6, 2010. 7:22 PM
The way I used was to take a single edge razor blade, the square/rectangular kind, and get the edge under of the magnet on it's backing.  I then just tapped it with a light hammer/screwdriver handle on the top edge, and that will usually pop them off their backing.  Just be careful, it's a razor blade.
Jakeg says: Jan 7, 2010. 12:12 PM
Thanks I'll try this and make the roof coffee cup soon!
Joeduke545 says: Jan 5, 2010. 8:36 PM
thats one great Idea   i am definetly going to make one
DoItOrDie says: Nov 19, 2009. 7:36 PM
Try this and give drivers the ultimate WTF!? moment .
sambushed.com/dntmegallery/main.php/v/2e93b9_1.jpg.html
Javin007 says: Dec 23, 2009. 8:59 AM
*heh heh*  I'd seen that before.  I'm wanting to say he DID get ticketed, but it was worth the price as it was an advertising thing.
fangmike says: Nov 19, 2009. 9:21 PM
You should put a fake "for sale" sign in your car window and have your cell number or a number that you don't mind getting a lot of voice mails...then you could see if people try to call you and alert you about the coffee cup.
Javin007 says: Dec 23, 2009. 8:58 AM
LOL!  I like that idea, except that would then give them a REASON to get on their cell phones.  Could get you into some trouble.  Particularly if they get ticketed for being on their cell phones and come after you.  This is the day and age where you can sue someone for injuring yourself while robbing them, afterall.
altomic says: Nov 22, 2009. 1:27 AM
there was a recent psychology film showing maybe 6 students throwing 2 basketballs to each .

the lecturer tells you to focus on counting how many throws are done during the 1 minute film.

most people say 35 - 40 throws.

http://viscog.beckman.uiuc.edu/grafs/demos/15.html

watch it.

count the the number of throws.

don't read any further until you have seen the film






a few people might say "why was there a gorilla in the film?"


etymological says: Dec 22, 2009. 10:25 AM
I wonder how many people, like me, notice the gorilla (or whatever else is odd about the situation) and simply choose not to say anything and to just answer the question presented.
MrHonda300 says: Dec 14, 2009. 1:28 PM
strong magnets to hold 10 lbs.
zvillesurfer says: Aug 6, 2008. 12:40 PM
lol i find it funny that no one would actually set a starbucks cup on their car. most people would get it from the drive through. haha i was cracking up after reading the intro.
gitemstevedave (author) says: Nov 30, 2009. 8:07 PM
 I don't think I've seen a drivethru Starbucks.
newbie life5 says: Dec 3, 2009. 7:12 PM
lol they just put a drive-thru starbucks by my house
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