In the traditional Jabenna, a water container made out of thin clay a liter of water needs less than 8 minutes to boil and coffee may be prepared in the usuall way. The Jabenna is an ideal heat collector for a parabolic cooker. It is black and the ball-shape can be placed in the focus to collect light from all sides. In the early morning or late evening when the sun is close to the horizon the parabolic mirror has to be positioned nearly vertical so that the light hits the pot from the side and top as well. In a pot with a lid the light from the top heats the lid but not the water.