vacuum flask is a kind of stainless steel water bottle.

vacuum flask is a kind of stainless steel water bottle.
When it is used, it can be heated up to about 300-degrees Celsius for 20-minutes. But we need to use it in a sealed container to avoid the pressure inside it.
The plastic bottle will be filled with water, and it will take about 10-hours for it to vacuum flask is a kind of stainless steel water bottle.
It can heat up about 30-seconds. So when it gets hot, the bottle won’t be able to work as a vacuum container. This bottle is designed to be used in the kitchen, for example.
In this case, we don’t need it for hot water. For us, this bottle works as an electric kettle.

stainless steel vacuum flask with lid and straw 304 316 high quality,made by a large vacuum flask factory

We can use the water in it as heating water instead of using hot oil.
You can also use this for boiling water and cooling water at the same time. If we were to take it home, our family will not know that they are using this .
However, in order to maintain the freshness of water when the bottled water is stored at home or at a hotel, you need a water purifier.
A water filter is one of the most common ways to purify water by making it pure. An electric water heater is also a good way.