Secret Safe in the Jar | Sugru




About: Innovative Projects, Diy's, Life Hacks

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)

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Step 1:

Start by cutting/etching the jars with bottle cutter.

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

Step 2:

Use glass cutter to cut a piece out of the ring.

We sanded the edges of the ring. You don't have to do it, unless it is really sharp.

Step 3:

We painted 2 of the pieces white.

Step 4:

Then we joined 3 pieces together with “Sugru”, making a little safe.

2x bottom pieces with a ring in the middle.

Step 5:

After that, we filled the remaining bottom piece with mayonnaise. It's better to use something that is not food, to make sure pieces stay together. You can try paint or PVA glue.

After that, we put the safe on top of the piece filled with mayonnaise and used "Sugru" to secure it.

Step 6:

After that ,we attached the final top piece.

Step 7:

We glued back the original label and another one on top.

We did not put any glue on the part where the hole is. We used white-tack to make the label stick to the jar.

If your label does not cover the area where the glass is joint, you can print a custom label, a little bit bigger than original.

Step 8:

Once “Sugru” had dried,
we filled the top piece with mayonnaise.

Now you can hide your valuables from other people.

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    23 Discussions


    5 years ago on Introduction

    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.

    3 replies

    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

    Bosun Rickaalemán3

    Reply 5 years ago on Introduction

    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"


    5 years ago on Introduction

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


    5 years ago on Introduction

    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 ?

    1 reply
    Jim Davidson

    5 years ago on Introduction

    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.


    5 years ago on Introduction


    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. :)

    1 reply

    5 years ago on Introduction

    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.

    1 reply

    5 years ago

    So clever!


    5 years ago on Introduction

    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!!