Circular design hot water bottle. Porri Yutampo 600, comes with a special fluffy cover to keep you warm. - Model Name: Porri Yutampo 600 - Included: Special cover - Design: Circular, White - Color: Cream-colored case - Purchase Date: 2026.01 ※Photos 1-2 are of my own items. I couldn't bear the cold anymore, so I rushed to Nitori to buy a hot water bottle. It seems to be popular, and there were only 3 left, so I bought two. I intended one for my child and one for my husband, but neither of them complained about being cold and unable to sleep. It's a hassle to tell my husband to use it when he didn't even ask, so I left them untouched for about a week. I was considering returning them, but I decided to list them on Mercari for a quick sale. You boil water and pour it in, then put it in your futon. It surprisingly stays warm until morning. When it cools down, I water my houseplants with it. Shipped via Mercari shipping. No pets, no smokers. Thank you for your consideration.