How many liters is a thermos?

The normal thermos bottle is 2.268 liters.

The function of a thermos bottle is to keep the temperature of hot water in the bottle and cut off the heat exchange inside and outside the bottle, so that the "heat" inside the bottle can't get out and the "cold" outside the bottle can't get in. If you put the popsicle in a thermos, the "heat" outside will not easily run into the bottle, and the popsicle will not easily melt. Therefore, it is scientific to call the thermos bottle a thermos bottle, because it can keep both "hot" and "cold".

Extended data:

How to choose a thermos bottle:

1, bottle mouth part

First of all, you can look at the bottle mouth of the thermos, is it regular and round? Whether there are irregular lines on the bottle mouth. Then plug the cork to see if it fits. Not too big or too small.

2, the tail of the glass tip

Because the bottle liner in the kettle is double vacuum, and the small tip is the sealing place. If the tip has cracks and other injuries, the warmth retention effect will not be very good. Sharp places must be carefully checked to see if they are complete.

3, aluminum powder

The inner container of the thermos bottle is coated with aluminum powder, which can reduce the heat loss. You can check whether there is any aluminum leakage when you buy it back.

If there is leakage, the insulation effect of the kettle is not very good.