A Sneaky Soda Can Safe

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.