We often see some pseudo science bloggers advocating that we use tea and salt water to test the thermal stainless steel water bottle, and put forward the argument that "if the inner wall of the cup produces dirt or discoloration, it proves that the thermal stainless steel water bottle is toxic", but no one actively mentioned the scientific basis behind it.
There are even some popular science articles in some daily magazines that can't store saltwater, tea, juice, milk and other liquids in the thermal stainless steel water bottle for a long time.
Taking the "salt water test" widely spread on the Internet as an example, the inner liner of most thermal stainless steel water bottles on the market goes through the process of sand blasting and electrolysis, so as to ensure that the inner liner will not react with water. The salt water may cause damage to the inner liner due to its corrosiveness, so it is not suitable to be placed in the thermal stainless steel water bottle for a long time. You know, stainless steel does not mean that it will not rust, but that it is not easy to rust.
Another kind of "tea test thermos bottle" is even more out of the question. First of all, tea polyphenols in tea is an active substance. After a long time of high temperature, oxidation will lead to activity reduction. Tea polyphenols are also one of the reasons for the production of tea scale. In some fake popular science videos, the description of tea scale produced after tea soaking as "corrosion of stainless steel bottle body" has no scientific basis and fabricates rumors. The output cost of such articles is very low, but the cost of scientific refutation is very high. Usually, no matter using special tea set or thermal stainless steel water bottle, it is recommended to drink the tea as soon as possible after the tea is soaked, so as to avoid the tea taste becoming astringent and losing its original flavor due to long-term storage.
Secondly, if tea is stored in the thermal stainless steel water bottle for a long time, it is easy to form a thick layer of tea dirt in the thermal stainless steel water bottle. The principle and process of these tea stains were supposed to be common sense, but now they are taken out of context by false science popularization and rumor makers, causing misunderstanding and confusion among many consumers.
If you read the instruction manual of the thermal stainless steel water bottle carefully, you will find that no matter which brand it is, the vast majority of manufacturers will mention "if you put salt food or soup, please take it out and clean it within 12 hours", "don't put carbonated drinks", "don't put acid drinks such as lime juice", "don't put dairy products for a long time", "don't put food or soup in the thermal stainless steel water bottle for a long time" Juice and other drinks and food "and other similar tips.
