Swansea Bay University Health Board lists a number of safety tips to make injuries do not occur.
For example, it is recommended that the water bottle is filled with hot, not boiling, water.
Furthermore, it is essential the stopper is securely screwed on, the bottle is filled to maximum three quarters full, it is wrapped in a towel to prevent direct contact, and that it is not taken to bed.
Before filling the bottle is in use Swansea Bay University recommends frequent examination of the bottle for signs of wear and tear, making sure it is tested to BS1970:2006 standards and to expel all air above the water level before sealing to prevent injury from the escaping steam.