Good MaterialThe hot water bottle is made from advanced thermoplastic PVC material and high quality soft fleece materials for an extra comfortable feel you'll love. And is completely harmless to contact with your skin. Leak-proof designThe screw cap greatly helps to prevent bottle leakage. The cover is removable and washable. Ensure maximum safety and transfer heat well. With tested, no risk of leakage and explosion. Keeps you warm for hoursThe hot water bottle and lid are designed to retain heat to ensure your comfort. Soft covers distribute heat evenly and protect you from overheating. It is ideal as a bed warmer. Easy to use The wide mouth is easy to fill or empty without removing its fluffy lid and an anti-splash lip prevents water from spitting out. Fill only to 2/3 of the maximum capacity. DO NOT fill with boiling water directly. Daily Life Assistant Good for sore and aching muscles, stress, migraines, arthritis pain and menstrual cramps, enjoy soothing relief. The hot water bottle helps relieve pain and creates a relaxing atmosphere and is suitable for any scene.