A Canadian research institute has developed a thermal insulation paper that converts light into heat, like a solar collector. As long as the paper is placed in a place where sunlight can shine, the space surrounded by the paper will be continuously replenished with heat, so that the food in the paper can be kept at a certain temperature and it is very convenient to eat. An edible Japanese wrapping paper made use of new technology, using bean dregs as a raw material, to make a wrapper that can be eaten with heat and that has a certain camp value. The wrapper is suitable for instant noodles seasoning and can be eaten together when eaten.