Ion was making Steam Metal this morning. She said she wanted to use it for massage. Kairo (a portable body warmer) is originally such kind of thing (using warmed stones, etc.), so I think it is a right use. When I used to work in a warehouse where it was incredibly cold in winter, kairo stickers (which you can put on your clothes like a sticker) were indispensable for me.
Ion:
Holding this makes me calm down very much because its temperature is like a little warm tepid water.
