Here is a really simple way to make it flat. Instead of having one piece of the foam go around the pot, cut it in half. Now put your gorilla tape on both seams while they are flat on top of each other. Push the two taped areas together to "open" it and fit your pot inside. It might even be possible to make hinges in a sense for a lid and a bottom that would fold up against the sides. If this doesn't make sense let me know and I will make one up and post pictures. I have a spare foam pad around I could use.