Solar cooker progress

For our solar cooker we have made some clear progress. We used to have an open box and the black jar inside but it did not carry enough heat. We thought of a plan to put a plastic bag around the jar to act as a mini greenhouse and it worked very well. The cooker got over 160 degrees in 2 hours and 200 degrees in 3 1/2 hours. Further updating will be tricky but we are thinking about putting clear plastic wrap over the top of the box for an extra affect and maybe adding a stand to the box. We have had a couple failures such as one of our group members getting moved to another class and our box having to be proped up on something because the wind blows it over. We aren't done yet but we are half way there.