The pressure cooker body should never be filled more than two-thirds it's capacity. This is to safeguard against blocking the steam vent/vent tube and to leave enough space to allow steam to circulate. Certain foods, however, such as soups and other liquid foods, foods such as lentils and rice which expand during cooking should not be loaded more than half the capacity of the cooker body. Dals which sprout, such as tuvar and moong, should not be loaded more than one-third the capacity of the cooker.