500ML. This classic hot water bottle has pressable bubbles on the surface. When you are warming, you can press the bubbles, which can not only warm and relax you physically, but also release the pressure to achieve spiritual relaxation. Whether it is used by children, adults or the elderly, it can make the body and spirit enjoy relaxation and pleasure at the same time RELIEVE BODY ACHES AND PAINS: If you are suffering from muscle soreness or body aches try using a hot water bottle. Simply fill it up with hot water and place it anywhere relief is needed. Heat can ease a range of pains from headaches to cramps. Easy To Use :Wide mouth is easy to fill and the anti spurt lip of hot water bottle with cover prevent water spitting back out like those old rubber ones. Fill only to two-thirds capacity maximum. Its transparent. No more guesswork about how much hot water is inside. GREAT FOR EVERYONE :Anyone can benefit from using a hot water bottle from athletes to everyday people both young and old. Athletes can use it for muscle recovery and sports injuries while everyday people can use it to relieve minor aches and pains. LONG LASTING WARMTH:This classic hot water bottle is built to last. Its red rubber material insulates water, keeping heat from escaping the bottle. Its screw cap securely holds water inside the bottle without the worry of spills. Make sure this fits by entering your model number.