Haybox cookers are so called because the early versions used hay as insulation. It is also referred to as fireless cooking or retained heat cooking. Jane and Seggy will be demonstrating this efficient way of cooking. More details on their website: www.sf-environmental.org/haybox-cooking.
They are also involved in a charity called SF Environmental. www.sf-environmental.org.
SF Environmental was established in November 2017 to promote technologies and products which protect the environment and have a positive impact on the communities in which they are used.