Thank you for viewing. [Heat Storage Warm Water Bottle] No need to replace hot water! This is an eco-friendly, heat-storage type warm water bottle that can be used repeatedly. It saves you the trouble and is convenient. [Rapid Heat Storage & Long-lasting Warmth] A mere 12 minutes of charging (heat storage) provides a warm feeling for 4 to 10 hours. *When used as a hand warmer, it can maintain warmth for about 4 hours. When used in a futon, it can maintain warmth for 6-10 hours (the specific warmth retention time may vary depending on the usage environment). You can sleep soundly even on cold nights. [Cover Made of High-Quality Artificial Rabbit Fur] The cover is made of high-quality artificial rabbit fur, providing a pleasant touch and a warm, fluffy feel. The cover is washable (hand wash only). [Multiple Safety Protection Design & PSE Certified] Water and electricity separation design, 6-layer explosion-proof PVC material, equipped with a pressure detection chip, temperature sensing function (shuts off power when exceeding 70°C), PSE certified, safe and reliable to use.