You make soup with the pressure cooker. When it has finished cooking, (it is necessary that the valve does not turn any more and that it does not blow any more the steam to not humidify the atmosphere) you put the casserole under the table of the kitchen on the tiling, or on a good thickness of newspaper if you have a plastic coating or a soil that fears.
So that will bring you warmth near the ground. Finally if you prepare it in advance, well before consuming it. It's better than cooling it on the window sill where the heat is lost.
To avoid if you have young children !!!Suggest a tip for this theme