Item Type: Hot Water Bottle Material: Rubber, knitting wool Weight: Approx. 452g/15.94oz Water Volume: 2000ML Package List 1 x Knitted Cover 1 x Hot Water Bottle 1Keep Water Warm: Hot water bottles are made of natural insulated rubber and have a slightly textured appearance to maintain the temperature of the liquid. 2Pain Relief: Rubber hot water bags can be used alone to relief pain and sports injuries, such as neck, back and shoulder pain, muscle soreness and menstrual cramps. 3Easy to Use: Wide mouth is easy to fill with hot water and the splashproof lip prevents water from spitting out. Fill up to 2/3 of the capacity. Make sure the hot water temperature does not exceed 80 before pouring. 4Soft Knitted Cover: Hot water bottle comes with a soft and cuddly knitted cover that is machine washable. Removable knitted cover helps insulate hot water and remains effective for 68 hours. 5Ideal for Winter: This hot water bottle can drive away the cold in winter and warm your neck, shoulders, stomach, etc. Give you a lasting warm experience.