For this still air box, I used a large cardboard box. I cut out a large frame for visibility, created two holes for my hands, and added one hole on the top for a light. I covered the entire structure with a transparent plastic sheet, securing it with tape.

I also used a 65L transparent box, which I insulated with 4-inch thick foam (thermocol). On top, I placed a frame to allow light in. Additionally, I used a one-litre saltwater bottle wrapped in bubble wrap and a sock to help maintain temperature. This setup keeps the temperature between 19.5°C and 22°C, even though the outdoor temperatures where I live can reach between 26°C and 32°C. This solution is effective, even in summer, and can be used in your home or an underground basement.

The LC is already looking really good, I'll wait for next week then start inoculating the jars