This is a test of commonsense. Complete the next sentence:

How to make a pringles can macro diffuser
Get your pringles can.
If you want to use other chip brands that come in a can, just make sure it is reflective inside and fairly similar to the pringles version.
Be sure to clean out your can first.
The chips won't do anything for your camera hardware. Take your flash that you will be using and estimate the size of hole you will need for it.