This is a rather involved instructable; however, the reward is well worth spending the hours (and i can guarantee you will spend less time on it than i did -- i had MANY problems which i will explain how to bypass). I like dualism and this project is perfect for me because the final product serves as both a normal can of Dust Off and a place to store some small valuable items.

The first step is to obtain an empty can of dust off (or another empty can of compressed air). Obviously if a can is empty you may not have one laying around, so i CAREFULLY emptied an existing can which was low on gas. Follow the set of "DO NOT's" on the back and carefully use spray it until there is nothing left. Now comes the fun part.

Step 1: Gather Materials

Pictured are the basic materials which you will need to create the Working Can Safe. This picture was taken before i started the project; i later learned that the Gorilla Glue will not work, so do not use the Gorilla Glus in the later steps. In searching for a bottle, i found that a "Move Free" vitamin bottle is a perfect fit. Whichever bottle you decide to use, make sure that it fits (step #3) and that the cap is a normal screw off, NOT A CHILD SAFETY ONE!.

Step 2: Cut the Bottom Off the Can

This part requires some patience to make a clean and even slice all the way around the can. To to it you are going to have to turn the can opener on its side so that the blade is cutting the side of the can, not the concave bottom. I could not get a picture of this part as i was by myself and could not hold the camera in the right position (believe me, i tried). Once the concave bottom is free, you are going to need to file down both the flat edge of the can and the edge of the bottom to make them smooth and fit together perfectly. The bottom is going to need to rotate inside of the bottom, so make sure it is smooth al the way around to look inconspicuous to bystanders.

Step 3: Prepping the "Safe" Part

After the bottom of the can has been removed, test fit the vitamin bottle to see if it is a close fit. It is better that the bottle is a little snug. DO NOT FORCE THE BOTTLE INTO THE CAN, ONLY TEST TO SEE IF IT FITS!!!!.

If the bottle does fit, begin removing the label by rinsing under hot water, then using a razor blade to CAREFULLY take off the label. Do not put force behind the blade, merely use gentle force to remove the loose label, working away from your fingers at all times.

After most of label has been removed, apply some Goo-Off to a paper towel and remove all of the glue and remaining label. You may have to go over the entire bottle three or four times to remove all of the tackiness.

Once the tackinees is all gone, use a fine to medium grid sandpaper to lighly sand off a thin layer of plastic so the bottle fits better. I found the when you can drop the bottle into the can and its takes about a half second to fall to the bottom that its a good fit (it takes this long because the air is forced to travel around the falling bottle. Since it is a good fit, it takes the air a second to get out of the way of the bottle. There needs to be some room around the vitamin bottle for the glue to fit, but not so much of a space that the glue becomes a structural component. Test fitting is crucial here.

Step 4: Attaching the Safe-Door

I started this step with the old cap because i thought i would be saving myself a step -- it already had a hole in the center so i figured i didnt have to drill it...only the hole wasn't actually centered, just kinda there. I found the center of the concave can bottom with a center finder (not sure of the exact name; however, this is what my dad calls it) and marked it with a permanent marker. Next i found the center of the new cap and used a drill press and unibit to drill a fairly large hole through the center of the cap. As the can bottom is concave and the cap is flat, if glued as is, there will be very little contact and thus very little sheer strength. To compensate, drill a large hole in the center and when glue is applied around the circumference of the hole, there will be MUCH greater surface area thusly increasing the sheer strength of the bond. Using the JB Kwik weld, attach the caps together. Prior to the glue's setting, spin the cap to ensure that the bottle cap is centered -- this is done by correcting any wobbles.

Step 5: The Safe

This next step was quite unfortunate for me as i spend hours trying to figure it out only for it to have failed miserably later...this is why i am going to let you know how to NOT make my mistake.

Because this can is intended on working as both a safe and a temporary can of Dust Off, i needed to think of a way to pressurize it. Sure an aircompressor would have been a) readily available, b)simple, and c) smart; however, i opted for the "cooler" idea of using dry ice to build the necessary pressure. The dry ice in conjuncture with the Gorilla Glue turned out to cause even more hours of work to fix the problem i created for myself. I will include all of my pics on the dry ice stage in the end of this instructable incase any daring souls out there would like to attempt to critique my idea and see if they can make it work....for the rest of you, i suggest just using an air compressor (or even a bike pump)

To attach the vitamin bottle to the inside of the can, mix up some JB weld and apply liberally to both the inside of the can (away from the opening) and along the bottom of the bottle. Other epoxies or waterproof glues may be used and are encouraged as this seam will need to endure air pressure. Once the bottle is in place, give it a little twist to smear the glue all around (remove the cap first or it will snap off. then reattach the lid so that the bottle sets in the correct place.

Step 6: Your Finished

Now you are finished the project. The video of it working, if you havent already seen it, is in the intro. Now you may put your most valuable items inside of the safe for safe keeping. Suggestions are rings and other jewelery, notes, private ideas/designs, money, SD cards, and anything else that you dont want in the open. For the willing, the next step is showing my mistakes, like i said, if you are willing to try and figure it out, please do. I hope you enjoy your secred hiding place now....oh yeah, i wouldn't necessarily suggest leaving the can pressurized all the time as it may leak or eventually wear out the glue seal. my suggestion would be to use an air compressor set to about 15 PSI and carefully pressurize it by depressing the trigger of the can and allowing the air compressor nozzle to fill the can's chamber with air. Although you may not be able to dust your computer, if a curious bystander picks up your valuables without knowing, the can will work as a temporary dust off so that he does not become suspicious.

Step 7: Dry Ice Out-takes

Originally i wanted to pressurize the safe with dry ice. I used all the necessary safety precautions: gloves, protective glasses, put my dog inside and used the dry ice in a well ventilated area...i even had my Physics teacher go over the Ideal Gas Law with me to deterine just how much dry ice i would need to obtain a safe PSI after sublimation. The gorilla glue's problem was that when i added the dry ice, even though i depressed the trigger to alleviate pressure buildup, the CO2 still pushed around the expanding glue.
<p>I did this with a deodorant can. I got one of those little straws that come with WD40 and connected the modified can to a normal can and just pushed down the nozzles of both with my finger. Seems to work well.</p>
Some grocery store carry dry ice. you need to call the store to find out which ones carry dry ice it In San Antonio theres HEB,but all the stores don't carry it. So call. Also you an get dry ice at an ice processor plant. Most cities have a plant that makes ice for grocery stores and restaurants. You need to call around to find the nearest one to your location.
Heck, even Wal-Mart and our local grocery store chains all sell dry ice.
I got a sizable chunk with an order from Omaha Steaks, but they say that it should have all sublimated before the package is delivered.
i saw a store that sells commercial ones and the labels are from real products
i thought this meant that you drill a hole in the safe and you fill it with the liquid thats inside.
Then freeze it, with ice instead :/
And you would get a Safe Cube! :)
sounds delicious
no just the door so you cover the mechinisim
i'm like 99% sure this is not considered cracking a safe, but making one.
me too. It is makin and breakin a safe. Money down the drain,whoooooooooooosh....
or a play on words during a competition to draw attention....
murrga bu!
I clicked on the instructable thinking it was to teach you how to crack a safe with dust off, lol.
I know this is old... the publix by my house sells dry ice.
Quality Dairy main distributing center in Michigan has it for sale. look in the yellow pages though for your area
anyone here
it's not a chatroom
what do you mean is anyone here?....no, the can made itselt?lol
Down South they sell dry ice at grocery stores. In the North, check the Yellow Pages for Ice Cream distributors, like where the Good Humor guy goes to get his product every day.
lets say i had another can of dust off, could i conect the full can on one end of the straw, and the safe can on the other and depress both triggers until the pressure equalizes?
that would work; however, the liquid inside the normal can is what expands causing the gas to escape (thus it gets colder) and therefore when they equalize it would be very low pressure (equivalent to how much pressure is applied by the trigger as this keeps all the pressure in). now if you wanted to completely disregard safety, and <em>hypotheticaly</em> (wink wink) turn the normal can upside down so that it sprayed the liquid into the other one, now that might just work. one would just need to be careful that the liquid didn't touch their skin or frostbite would occur (as well as cell death). but ofcourse this is only a hypothetical suggestion. if one ever tried this, i would like to know how it works out. thanks and good luck<br/>
that is fun to spray on a table and then push into a pile and than tap... or spray it on your laptop screen... it is so cool... it seems to freeze...
"Instant Cell Death" upon touching dry ice or liquid propellant is really a load of rubbish. I have spilt liquid butane and many other propellants on my hands and it is cold, however it DOES NOT CAUSE INSTANT CELL DEATH as my hands are both still perfectly fine. The liquid evaporates very rapidly, but your skin has a layer of already dead cells on top that insulate the live ones. I have also handled dry ice; this can cause frostbite but is also possible to handle safely, but for no longer than about 2 seconds, and keep it moving.' Please do take every precaution, but don't be stupid or you will get frostbite.
anywhere that sells compressed gas and other gaseous chemicals. i go to Praxair when i need dry ice for "projects".
nice heres mine great instructable btw
Thats awesome! did you come across any problems or did i help you avoid them? also, how well does it work? Thanks for posting a pictrue, you did a good job! jon
well i didnt have any problems only i didnt have ny jb weld and couldnt get gorill glue to work so i used hot glue. ill probably pull it out and reglue wen i get some JB weld or some epoxy so itll hold air but for now it just is an empty can with a compartment in it
Once the bottle is in place..centered & to the correct depth.. turn the can bottom up minus the lids and put a stout bead of epoxy around the neck of the bottle to the base of the threads.. This should seal the bottle to the sides of the can with an air tight & pressure resistant seal. Just keep it below the thread line. You might want to rough up both surfaces with sandpaper for a better bond. What thinks ye.?.?.? FN
sounds good. i did rough it up, you'll notice in one of my steps a pink sanding foam piece (something cheap from Home Depot). And i used wood glue because i made my mistake with Gorilla Glue. See, i thought gorilla glue was like an epoxy...i was sadly mistaken :-( but yeah, thanks for the advice
oh no! not instant cell death in skin! aaaahhh!.....
I'd like to point out that Pampered Chef now sells a can opener that lifts the lid off the can by prying the side rather than cutting. Do you think that would work on these cans?
it should...i was actually going to use that style as i have one at my work; however, i forgot and had to make do with my girlfriends. it worked fine only i had to go real slow and sideways....also, you cant use too much pressure or the gear is going to leave little dents around the bottom of the cap, so yeah, give the pampered chef one a try
i bet the dry ice would work better with the JB weld...though...it might push the JB down and glue teh cap shut...hmm...worth a shot hehehe next would be to work out a way of refilling the thing..as keeping your stuff in...what is basically trash is a bad idea (#1 because mothers tend to throw trash away #2 "why do you have an empty can of...OOOOHHHH the bottom twists off..SCORE!!") maybe you could attach some form of fill tube with a one way valve through the bottom of the bottle on the inside....that way when the preasure is gone you could refill with a compressor...or more canned air etc... nicely done indeed!
it is refillable...you dont need any of that, just depress the trigger and refill with compressed air and release the trigger. there will be a quick shot of air inside of the can...i do like shark's idea of equalizing them though..i had thought of that, only i just used the last of my compressed air. :-)...thanks for all the ideas though
yo ucould have linked the straw from your can to a full can of compressed air (or spray paint) and sprayed. it would have filled it up untill it equalized the preasure. <br/><br/>i might do an instructable on the matter =)<br/>
Very good idea! I do'nt know what is Gorilla glue. If it is not silicon sealant, I suggest this.
Great Instructable! I very much enjoyed your humor and comments about previous attempts. How did you fill the can in the end? Air pump? Did you consider a butane refiller? BTW: Save money on Gunk. Naphtha (Zippo lighter fluid) works as well on adhesives.
yeah, i used my dad's air compressor. i was lucky and really only got one or two shots out of it and they were used for the video. the glue seal on my broke because i originally used gorilla glue so there were many gaps/air pockets. i attempted to fix this by applying a HUGE amount of waterproof wood glue to hopefully fill in the gaps....its held for a little. Just play around...its has been proven so take a stab at it.
genaurdi's...in my area genaurdi's is a branch of safeway. they sell it for $1.99/lb, so its really cheap and readily available.
This is such a cool idea! I would'nt have thought of it, and not sure if i would be skilled enough to do it. I really like your ideas. Great Job!
Awesome! love the Idea! I myself have have tryed this awhile back. However failed at the can opening part. So I stopped there. A + Deffinitly

About This Instructable




Bio: kreationism.com I am a senior this year at Drexel University in Philadelphia, PA. I expect to graduate with a degree in Mechanical Engineering in ... More »
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