On the market there are a few different tools to make this pots, this is an easy way using things you probably already own.
Step 2: Basic cutting
Step 4: Folding the bottom of the pot
Step 5: Flatten the bottom
Step 6: Fill with soil
Step 7: Final planting
It is useful to put the pots together as this will create a great climate for growing plants. When you water the plants the water will gradually diffuse into surroundning pots making the maintenance of pots easy.