In this project we will be making a secret safe in a jar.

We will need:

  • 3x Mayonnaise jars (can be ketchup or any other food)
  • Bottle cutter
  • Glass cutter
  • Sugru
  • White- tack or Blue-Tack
  • Some glue
  • White acrylic paint (optional)

Step 1:

Picture of

Start by cutting/etching the jars with bottle cutter.

Separate the glass, using candle and ice method or any other method you prefer.

aalemán31 year ago

Very clever. I would take the lazy way and just paint the inside of an empty mayo jar... pretty much what Parky1972 described. I'm also a fan of the Denzel Washington "Flight" method - wrap stuff in brown paper, label it as "Veal" and toss it in the freezer.

ShakeTheFuture (author)  aalemán31 year ago

Freezer is still a very popular place where people hide things. There is unwritten law. If you bought a house that was not occupied for many years, you should NOT open the fridge or freezer. The smell can kill :)

But since people hide valuables in a fridge or a freezer, maybe that law should be ignored :)

I don't know that it would be bad after years, it's the window of more than a couple of days without power, to maybe a couple of months. After that decay will be completing, and though still disgusting, smell should decrease

This reminds me of my mother doing much the same thing. She used baby food jars, and filled them with paper money until she reached the desired amount. She then filled the jar with water, and placed it in her freezer. She called them her "Frozen Assets"

SparkySolar10 months ago

I like your Instructable

Thank you so much for sharing


ShakeTheFuture (author)  SparkySolar10 months ago

Thank You!

evacooper1 year ago

that is cool. you sound like gru btw, who probably would like this...


bonjo1 year ago

Can i ask the brand name of the unit (cutter)you rolled the jar on ? It looks a great cutter ! where could i buy one ?

ShakeTheFuture (author)  bonjo1 year ago

It's Ephrem's Bottle Cutter


Highly clever project and a GREAT instructable! I'm a huge fan of cutting bottles and glass and I don't want to a take that experience away from anyone but, I think I would take the lazy approach as well with a slight difference. Paint the inside first and let it dry. Next, fill it half way with Plaster of Paris, this would give it the right heft of a full mayonnaise jar. After the plaster dries thoroughly, seal the plaster with polyurethane. Now you're done. Put your stuff in it, screw the lid on and hide it in plain sight...say, in the pantry, with the rest of the unopened provisions.

Parky19721 year ago


Great idea. But I can see the lable becoming an issue.

why not simply use an empty jar. Mix some off-white paint and paint the inside of the jar. Let it dry. seal the paint with a PVA glue to protect it from scratches.

Once dry. Just use the entire jar to store your valuables.
How many thieves are going to go through all your jars in the cupboard / fridge looking for notes, keys etc?

If you are worried about the contents rattling or lack of weight, line it with bubble wrap or packing foam and put a large stone in the bottom of the jar.

But I do like the idea. Very Jurasic Park. :)

ShakeTheFuture (author)  Parky19721 year ago

Thanks for a tip :)

WHere are you from?

ShakeTheFuture (author)  johnstat0001 year ago

I am from Latvia.


nbrewer41 year ago

Before you start cutting, put white paint in the empty jar and put the lid on. Swirl and move the jar until it is thoroughly coated on the inside. Take the lid off, drain the excess paint, and let it dry. From the outside, it will look like mayonnaise, but no chance of spoilage.

ShakeTheFuture (author)  nbrewer41 year ago

That's a good idea.

tofugami1 year ago
So clever!
poofrabbit1 year ago

This is a great idea! Perhaps for the bottom, you could use cualking, if the white is two white you could add a little acrylic paint to achieve the right color. It could look mayo like, but with out the bottom ever going bad. :) Great instructable!!

fozzy131 year ago

Every time I've tried to cut glass bottles or jars with the fire and ice method it turns out badly with tons of fractures. I guess with enough practice it can be done well. This looks awesome thanks for sharing.

ShakeTheFuture (author)  fozzy131 year ago

Interesting. It's actually my preferred method. I have tried dropping bottle in hot/cold water or spinning bottle under hot and cold water. Fire and ice method gave me the best result. Thanks for taking time to leave a comment.

Awesome this is really helpful.