Which Liquids Are not Suitable for the Thermos Cup？

Some people think that the stainless-steel vacuum flask has a good insulation effect, so they put everything they want in it. However, not all liquids are suitable for storage in a thermos vacuum insulated bottle. In this passage, we will introduce six kinds of liquids that are not suitable for vacuum flask.

 

 

1. Acidic Drinks

The inner layer of the double layer stainless-steel thermos flask is mostly made of stainless steel. Although it is resistant to high temperature and not easy to deform, it is not resistant to strong acid. Lemon juice, sour plum soup and other beverages that have many acidic substances can easily damage the stainless-steel inner tank. If the quality of the steel vacuum flask itself is not good, it may even cause some heavy metal substances to precipitate out, causing health problem to the human body.

 

 

2. Carbonated Drinks

In addition to keeping water warm, many people use thermos cups to keep water cold, such as iced carbonated drinks. However, we must know that carbonated beverages are corrosive. If thermoflask stainless steel contacts it for a long time, it is likely to be corroded and some harmful substances will be precipitated, which will endanger body health after drinking.

 

 

3. Milk

Some people will put hot milk in a vacuum insulated flask. However, it will allow the microorganisms in the milk to multiply rapidly at a suitable temperature, leading to corruption and easily causing diarrhea and abdominal pain. When milk is in a high temperature environment, vitamins and other nutrients will be destroyed. At the same time, the acidic substances in the milk will also chemically react with the inner wall of the vacuum flask, which will affect human health.

 

Anhui Agricultural University once did an experiment. They heated the milk powder, pure milk, and fresh milk to 60°C respectively, and then stored them in an insulated flask bottle, and checked the bacteria every 2 hours. It was found that the bacteria in the three types of milk proliferated in large quantities after 12 hours, and all exceeded the safe drinking standard. Therefore, if we put milk, soy milk, and other beverages in a vacuum flask, it is better to drink them within 1 to 2 hours.

 

 

4. Tea

Another experiment conducted by Anhui Agricultural University proved that if you use a metal thermos flask to make tea and keep the tea in a high temperature for a long time, many nutrients such as vitamin C, flavonols, tannins and theophylline will be affected. And the nutritional value is greatly reduced. In addition, if it is steeped for too long, the tea may release heavy metals, which is harmful to health. In addition, the thermos cup will change color when it keeps hot tea for a long time.

 

 

5. Chinese Medicine

Chinese herbal teas and Chinese medicine are not suitable for drinking in a vacuum flask water bottle. Because a large amount of acidic substances is generally dissolved in the decocted Chinese medicine, it is very easy to chemically react with the inner wall of the thermos and dissolve into the decoction, which not only affects the efficacy, but also harms to the human body.

 

 

6. Salty Drinks

In order to ensure the safety of drinking water, most inner container of the insulated vacuum bottle is processed by sandblasting and electrolysis. However, salt is corrosive and it can damage the stainless-steel tank just like acid. Therefore, salt water and other salty beverages should not be stored in it for a long time.