SAFE LEAK-PROOF DESIGN: The thermos bottle is made of high-quality thermoplastic PVC material, and the screw cap helps prevent the bottle from leaking. Safe and easy to fill and use. Tested for compressive strength and tightness, it is completely safe. Heat storage: The hot water bag is made of rubber, which has good heat transfer and good thermal insulation performance. It keeps the water warm for a long time and keeps you warm. For safety, it is recommended that the water temperature does not exceed 80 degrees Celsius. Keeps you warm: A thermos keeps our hands, waist, legs and necks warm and makes us feel good. It also relieves physical ailments such as joint pain, dampness and cold. It also acts as an excellent cooling pad to reduce puffiness. Best Choice: Hot water bottle to warm hands, neck, waist, back, legs, etc. Suitable for children, adults and seniors, it is the best choice for gift giving. Size: 19*9.5cm color: grey Packing list: 1pcs