Step 1: Find the material
Apart from the pot, you have to find a metal tube which will act as a hole puncher. I found an old curtain rod in the attic. You will need work gloves to hold it when it's hot.
Finally, you will need any type of color/sticker/paint to customize your lampshade. I used an old spray can of red paint.
Step 3: Warming the hole puncher
I protected the cooker in case the plastic might leak, but it was not even necessary. I also kept the very dynamic children away from the kitchen for a while.
Step 4: Punching the holes
Step 5: Customizing
I put two layers of paint.