A Sneaky Soda Can Safe

About: Carnegie Mellon Design + HCI

Here is a simple instructable that can prevent family members coming into your room and taking your valuables. The soda can safe is a clever yet secure way to confuse oncoming friendly marauders.  

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Step 1: Materials List

You will need...

1. can opener
2. a soda can (Pepsi is easiest to remove top)
3. foam core, paper towel or spray insulation... your choice
4. some kind of jar or canister. (I used a small jam jar i had left over)
5. Hot glue

Step 2: Putting a Hole in the Can

First clean your can so that it doesn't start growing bacteria. simply guide the can opener around the mouth of the can and make a clean cut around so that you have the top of the can in a disk to work with.

Step 3: Holding Installation

This part is probably the trickiest. I advise to use a product called Great Stuff which is a spray insulation that expands and turns into a very decent foam holding material for your jar. I was cheap and made this project in less than 15 minutes and used bunched up paper towels to take up space. as you can see in the photo above i estimated how much paper towel to put in and had to fit it around the jar to keep it in place. the good thing about Great Stuff is that while it is expanding you can go ahead and place the jar in the perfect position, and if it expands to much over the jar you simply cut it off with a utility knife.

Step 4: Making the Cap

In this last and final step all you need is the piece of soda can you took off and the lid of the jar you chose. It is pretty self explanatory. all you really need to do is just hot glue them together as in the photo.  Now when everything dries put them together and you have your very own soda can safe! have fun!

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    17 Discussions


    Question 11 months ago on Introduction

    I can't find a can opener for the life of me. Is there another tool you'd recommend for removing the lid of the can?


    8 years ago on Step 4

    I haven't been able to do this and really look like an unopened soda. You can buy these professionally made. I have seen them at truck stops and on-line

    4 replies

    Reply 8 years ago on Introduction

    You can get it perfect with almost no skill.
    I may post an instructable soon.
    The trick is not to use a can opener, but a dremel with a short blade and carefully cut all around the top.


    Reply 3 years ago

    I was thinking dremel would work better than a can opener as well, before ever looking this up. You can also use silica along the edges and a TP roll, or another soda can cut down & rolled to your preferred size in the middle. Keeps it about the weight of a real soda. You will need an O ring to seal it off.


    Reply 8 years ago on Introduction

    O cool... thank you... i really didnt care about aesthetics but thank you for the support i suppose


    Reply 8 years ago on Step 4

    thanks you your feedback is greatly appreciated, of course your not going to get it perfect but up on a shelf no one will tell the difference.


    8 years ago on Introduction

    How would you close the can? That would problably be a good thing to put in the instructable. After you glue the lid does it snap on or is their a way to screw it on and off?

    2 replies

    well mine after usage becomes easy to snap on and snap off but it depends on the jar you use. Thanks alot on the feedback. I should be coming out with a new instructables today or tomorrow:)

    LucasOchoaDr. Pepper

    Reply 8 years ago on Introduction

    Haha i hope your being sarcastic man if you want to see some other photographs ill be making a flickr soon:)