Why Are Thermos Cups Not Suitable For Containing Acidic Substances?

Everyone knows that stainless steel thermos cups are not suitable for containing acidic substances, such as acidic beverages, milk, etc. Everyone may only know one thing and the other, is the thermos really not suitable for carbonated drinks? Have you ever wondered why it can't be installed? Only by understanding the thermal insulation principle of the thermos can we solve the problem, and today we will see why it is not suitable.

First of all, let's talk about carbonated beverages. As we all know, carbonated beverages are gaseous things with strong permeability, and the thermos cup is used to prevent water leakage by a plastic body called a rubber ring, which cannot prevent carbonated beverages. Especially when the thermos cup is bumped, the gas of carbonated beverages will come out in large quantities, and the leakage will be more serious.

This is a common situation, and a more dangerous situation is that the thermos cup bursts. When the sealing performance of the thermos cup is relatively high, the gas generated by the carbonated beverage liquid contained is more likely to cause the thermos cup to burst.

Secondly, carbonated drinks, milk and dairy products all contain acidic substances, and the acidic substances will have a chemical reaction on the stainless steel of the thermos cup, which will cause the drinks to deteriorate and taste bad.

Moreover, the stainless steel of the vacuum flask will also be oxidized and rusted, which will shorten the service life of the vacuum flask. Therefore, the thermos should not contain these acidic substances when it is not necessary. Of course, if some situations cannot be avoided, it does not matter if you use the thermos once or twice.