That's not the idea of potting up.
If you put a small plant straight in a massive container, it will concentrate it's growth on it's root system rather than it's foliage. That's why you pot up in incremental sizes.
As above really.
Got my seedlings in individual 5cm x 5cm pots. These will then go to into 10cm pots, followed by 18cm pots. Then I have a decision to either leave them in the 18cm pots which stops them growing like mad, or I can repot further to grow a larger plant with larger chillies.