Great Gift & Random Color - For the hot water bottle, the color is sent by random, maybe you will receive 1 piece pink, blue or yellow. It can be used as cold compress for kids with fever. Helps to improve blood circulation, ease menstrual pain and feel more relex during the special period. Multi-functional Usage - Our hot water bottle bag works great for pain relieving, arthritis, sports injuries. Hot therapy helps to relax your tired muscles and tensed shoulders from stress and too much workout. They can also be used for cold therapy, easy fill in cold water or crushed ice. Comfortable Plush Waist Cover - Comes with a plush waist cover, designed with super soft double insert, keep warm to your hands and waist at the same time. Helps to prevent the heat from contacting your skin directly, which can cause burns. Wide Bottle Nozzle - Comes with an anti-squirt stopper, safety and easily let water in and out, prevent water spitting back out. Our hot water bottle maximum capacity 900ml, suggested to fill to two-third. Durable & Safety - KUYOU hot water bottle is made of rubber to ensure maximum safety and transfer the heat perfectly, keeps the water warm for a longer time. To be more safety, the temperature of the hot water should not exceed 80 degrees celsius.