1. DO NOT add boiling water directly, it's a favour to add 40°C -75°C/104°F-167 °F, only keep 2/3 full. It'll be better if a soft fleece cover is put on.
2. As a cool bag, recommended the water/ice cannot be below -20°C.
3. When it's left unused, make it dry enough and properly inflate it then place it under a ventilated place. Don't be exposed to the sun.
4. DO NOT close directly to the body for a long time for fear of scald. Do not fall asleep with a hot water bottle.
5. Before using always check if there a no signs of damage or leakage.
6. Hot water bottles must never be used as cushions or be sat on.
7. Be careful with children, should use it under adult supervision.