SOFT AND COMFORTABLE: The thermal jacket with lid is made of plush material with a comfortable and smooth surface. The jacket of the hot water bottle is machine washable and easy to put on and take off. Professional Material: The thermos is made of rubber. The material is environmentally friendly, odorless and recyclable. Long-lasting Heat Retention: The thermos with lid is leak-proof. Thanks to the highly developed sealing technology, the thermos with lid can store heat for a particularly long time, good heat and warmth properties. Versatile: the hot water bottle is suitable for the neck, shoulders, back, stomach and other parts of the body. A thermos can fight the cold while relieving pain. Thermoses are great Christmas gifts for friends and family. Large thermos: 2L large capacity thermos, water inlet 29mm, lining size 31*18cm.