Cute cover

I went to my grand father's house today. This kitty is cover of hot thing. Do you know Yutanpo? How do I say this is? Yutanpo is hot thing and you can worm it. You watered hot water in this case and when you sleep, you hold this one. By the way I do not have this Yutanpo. This is my grand father's one. How cute isn't it? I was laughed when I watch holding my grand father. He was given the cover by his niece. I will buy another case for his birthday. (96 words)