Why do small drops of water condense on the surface of the stainless steel vacuum flask after it is filled with cold water?

When I wrote the title of this article, the editor wondered, do many readers think this question is a bit idiot?There is cold water inside the water cup. Isn’t it normal for water to condense on the surface of the water cup?

In the hot summer of life, in order to cool off the heat, we all have the experience of drinking cold drinks.A cup of ice-cold drink can instantly eliminate the heat, and let us who are intolerable in the heat immediately experience a kind of refreshing ice.

The stainless steel thermos cup adopts a double-layer structure, and a vacuum state is formed in the interlayer between the outer shell and the inner container through a vacuuming process.The more thorough the vacuum, the better the effect of temperature isolation.This is the reason why some of the water cups when you buy a vacuum flask are poor in heat preservation, and some of the water cups have a particularly good heat preservation effect.

The thermos cup keeps not only hot drinks, but also cold drinks.Therefore, after a good-quality stainless steel vacuum flask is filled with cold water, there should be no condensation on the surface of the glass.If water droplets appear, it can only indicate that the insulation quality of the water cup is relatively poor.

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