The SK-14 is a parabolic solar cooker invented by Hans Michlbauer of Germany. It can cook for 10-15 people per day with only 2-3 hours of sunlight. (Using a pressure cooker dramatically reduces the cooking time.) Food can be kept hot for hours (or allowed to finish cooking) using a retained heat cooker. An SK-14 is shipped flat and ready for assembly with component parts, in the box, ready to assemble.