Fully Functioning Spray Can Diversion Safe: keep your valuables protected

Step 5 Resizing the internal tube

You will find a long thin tube on the inside of the can, which must be cut to fit the new size of the internal cavity. You will need to take off about the length of the bottle and cardboard. One possible method that works well is to take a wooden skewer and mark the height on it with a sharpie. Then, push the skewer into the tube until it reaches the mark. Cut off the tube at the tip of the skewer. Save the cut off section of the tube because it will be used later.