1. Apply gas to cooker
2. Set the cooker on ground, attach the pot
3. Pick up the contraption

The completed cooking set takes 2 slots whereas the separate items take 6

Also It is somewhat hard to understand how the gas cooker and pot works. Attaching the gas to the portable stove is done via inventory but adding the pot to the cooker is done via the vicinity menu, by dragging the pot into the cooker. This is somewhat confusing how exactly this contraption should be set up.
Also I still haven't found a way how to pour the water and rice to the pot, is this item functional at all ? Should I write another ticket about this?