Keeping Water Hot in a Flask?

jean leiner

February 12, 20100 found this helpful

Fill the flask with the hottest water you can to preheat it. Then fill with the boiling water you are trying to keep hot. This may sound redundant, but preheating the flask makes it keep things hot longer. Save the preheating water for preheating again, or use to water plants when cool.

Lelia Jo Cordell
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February 13, 20100 found this helpful

If the flask itself isn't a thermos-type one, I'd say get the water hotter than it has to be before you put it in the flask. Then wrap the flask in a "cozy" of some sort.