Yutapon for Microwave Sumikko Gurashi Design I bought several, and I'm selling this one because it's new and unused. Just heat it in the microwave for a comfortable warmth that lasts for 7 hours. Reusable. I will take it out of the box and fold the box. I plan to ship via Yu-Packet Post. Please consider only if you have no issues with the shipping method. A cute character-patterned hot water bottle type that heats in the microwave and stays warm for 7 hours. - Size: 18 x 25cm - Usage Time: 7 hours - How to Use: Heat in the microwave