Stainless steel thermos cups are not suitable for containing acidic substances, such as acidic beverages. The average consumer may not know why. As a leading manufacturer of stainless steel drinking cups, KingStar shares the reason here in detail.
First, let’s talk about carbonated drinks. As we all know, carbonated drinks are gaseous things, and the thermos cup is used to prevent water leakage from a plastic part called a rubber gasket, which cannot prevent carbonated drinks from leaking. Especially when the thermos cup / vacuum flask is bumped, the gas of the carbonated beverage comes out in large quantities, the pressure in the cup increases, and the leakage will be more serious. This is a common situation, and another dangerous situation is that the thermos cup bursts. When the sealing performance of the thermos cup is relatively high, more gas is generated from the carbonated beverage liquid, and the pressure in the cup is too large, which is easy to cause the thermos cup. Bursting, the cup lid sliding teeth burst or burst.
Second, the acid will have a chemical reaction on the stainless steel of the thermos, which will cause the beverage 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.
Third, acidic beverages can easily lead to the migration of heavy metal elements such as chromium, nickel, and manganese, thereby affecting health.