I am not sure if you believe there is danger in using warm / hot water dispenser. I think it is better to stick to our traditional way; boiling only went we need hot water or using flask (They are environment friendly too).
A pharmacist report from Singapore warns people NEVER to keep boiling your drinking water!
Report Summary: TOP harmful chemical named (Toxic Nitrate) is produced in water when you keep boiling it! This harmful substance had been proven to increase the chances of intestinal and stomach cancer.
IF you are currently using a 'WATER DISPENSER with WARM / HOT WATER Functions' or 'Electric AUTO Keep-Warm Thermos' for your convenience, STOP IT NOW, otherwise you would be killing yourself slowly as well as your loved ones!
NOWADAYS, there are so many drinking-water companies which OFFER FREE WATER DISPENSER when you order drinking water from them! THINK WISELY before you order!
YOU might get a FREE water dispenser but in fact you would be paying with your OWN HEALTH!
