Why insulated cups are not suitable for containing acidic substances

Why insulated cups are not suitable for containing acidic substances
Everyone knows that stainless steel insulated cups are not suitable for containing acidic substances, such as acidic drinks, milk, etc. Perhaps everyone only knows one thing but not the other, is a thermos really not suitable for holding carbonated drinks? Have you ever thought about why we can't pretend? Only by understanding the insulation principle of the insulation cup can we solve the problem. Today, we will delve into why it is not suitable.
Why insulated cups are not suitable for containing acidic substances
Let's first talk about carbonated beverages. As we all know, carbonated beverages have gas and strong permeability, while thermos cups are used to prevent water leakage by using a plastic material called a rubber ring. This material cannot prevent carbonated beverages from going out, especially when the thermos cup is bumped, a large amount of gas from carbonated beverages will emerge, making the leakage situation even more serious. This is a common situation, and there is also a more dangerous situation where the insulation cup bursts. When the sealing performance of the insulation cup is relatively high, the gas generated by the carbonated beverage liquid inside is more likely to cause the insulation cup to burst.
Stainless steel insulation cup
Why insulated cups are not suitable for containing acidic substances
Secondly, carbonated beverages, milk, and dairy products all contain acidic substances, which can cause a chemical reaction on the stainless steel of the insulation cup, leading to the deterioration and flavor of the beverage. Moreover, the stainless steel of the insulation cup can also rust due to oxidation, reducing the service life of the insulation cup. So don't pack these acidic substances in a thermos cup when it's not necessary. Of course, if some situations cannot be avoided, it's not important to use a thermos cup once or twice.