Both the spiral piece and the piece with the holes in it are made of aluminum like that used for wind shields. It folds up very small and weights nothing. I just used the same pot that I would boil water in for cooking so I didn't need anything else. She used a very small pot that I think would only hold 1 muffin cup which works for solo camping. I never used the bag yet all I did was make muffins in the cup cake cups.