The idea for the EB Cooker evolved as we were building and analyzing funnel cookers and Parvati cookers. These cookers, and most other panel cookers, primarily heat the top and sides of the cooking pot. The heat transfer mechanism from the top of the pot to the contents of the pot usually is not very efficient. Therefore, we decided to design a cooker that heats the bottom and sides of the pot. Parabolic cookers meet this requirement. However, they are dangerous because of the point focus, they are relatively hard to build because of the parabolic curve, and the heat usually is unevenly distributed over the pot surface. We chose to design double angle cone and triple angle cone cookers because they are relatively easy to build, and do not have a point focus. The only curves that need to be