In old times, to boil water was a time-consuming chore, having first to start a fire in a charcoal stove or firewood one.
Thus, almost every household had one or more Thermos Flasks, to keep the boiled water hot and ready for dispensing at any time. I remember we had two big ones which were used to hold plain hot water, and a smaller one to hold hot coffee. But the coffee always had a sourish taste after a while — I disliked that.
Oh by the way, every now and then, some playful cicak would emerge unexpectedly from behind a flask while it was being carried — causing panic and, sometimes even triggering some spontaneous “Latah” dance.
Then all that was held broke loose, sending the flask crashing to the floor and badly traumatizing the poor Lizy.