Fissler FSSFIS5850 Vitaquick FIS5850 Pressure Pan Set, 4 L, Stainless Steel Vitaquick pressure cookers are completely silent and steam-free The handle automatically locks with an audible click when closed properly Vitaquick has a conical pot shape, so that cookers of the same diameter may be stacked for space-saving storage Cleaning the maintenance-free main control valve simply involves rinsing the lid under running water The internal measuring scale is a fast and easy reference