Interesting...This is a simple technique for insulating windows with bubble wrap. Bubble wrap is often used to insulate greenhouse windows in the winter, but it also works for windows in the house. You can use it with or without regular or insulating window shades. It works great for windows of irregular shape. Mist window with water and apply, you can apply another layer on top if you need to. You can get it free from furniture stores & reuse it every year.