What is the best material for the liner of the thermos cup?

The material of the liner of the thermos cup is closely related to the degree of heat preservation of the thermos cup. Nowadays, the liner of the thermos cup is made of various materials, so consumers must choose a good thermos cup liner. Material, so as to ensure the insulation effect of the thermos cup and allow you to drink warm hot water in winter, so let’s talk about what material is good for the liner of the thermos cup? What material is good for the liner of the thermos cup

< p> The inner tank of the thermos cup has its own benefits. Here is a list of the advantages and disadvantages of several common thermos cups:

1. Plastic thermos cup, this is a relatively common type. A lot of materials used. Thermos cups made of this material can only have the function of heat insulation, and can only keep heat for about 3 hours at most. Plastic thermos cups have poor thermal insulation effect and are generally not suitable for use in autumn and winter. Prolonged use of plastic cups may cause cancer.

2. Ceramic thermal insulation liner. The liner of this material is completely harmless and does not contain a lot of harmful substances like plastic, nor does it release a lot of heavy metals like metal cups, etc. . However, the ceramic thermos cup liner is a relatively uncommon material and is relatively rare on the market.

3. Purple clay thermos cup. This type of material has a heat preservation function. Some of the better purple clays also have health care and conditioning functions. The inner liner of the purple sand is often matched with the outer shell of stainless steel, which can extend the service life of the purple sand cup. Purple sand has good thermal insulation, and the heat transfer is relatively slow, so it is not easy to burn your hands.

4. Glass thermos cup, this is a healthier cup, but it is not very resistant to falling. The substance of the glass is relatively stable and will not leak impurities due to boiling water. Glass cups are easier to clean, but harder to carry around.

5. Stainless steel thermos cups should be made of food grade 304 stainless steel, and the country has clearly stated this. Stainless steel contains some iron elements, but some inferior stainless steel will also release some toxic heavy metals. Stainless steel thermos cups are not suitable for making tea, as they will lose the fragrance of the tea.

In fact, you can see what kind of material is better for the thermos cup. Some colored water cups are more likely to dissolve heavy metals, and it is very dangerous to use such plastic cups for a long time. Glass cups are the healthiest choice, the firing process contains no chemicals, and they are easy to clean. Ceramic thermos cups with no color on the inner wall are safe. Choose a colorless glaze. This kind of material has the characteristics of high temperature resistance and heat preservation. It is a good choice for drinking water or tea. Therefore, from a safety perspective, it is better to choose glass, but from the perspective of portability, it is better to choose a stainless steel thermos cup. Consumers should judge which thermos cup they want to buy based on their own needs. What should not be put in a thermos cup

1. Milk

Milk is rich in nutrients, and many people will drink it at any time. However, because milk is rich in nutrients, vitamins and other nutrients are easily lost in high temperatures. It is destroyed in the food, and the microorganisms in it are easy to multiply rapidly at a suitable temperature, leading to corruption and easily causing diarrhea and abdominal pain.

2. Juice with high acidity

Juice should not be kept at high temperatures to prevent vitamins from being destroyed. In addition, juice with high acidity can easily react chemically with the inner wall of the thermos cup, affecting human health.

3. Tea

Tea contains a large amount of tannic acid, theophylline, aromatic oils and multiple vitamins. It should only be brewed with water around 80℃. If you use a thermos cup to make tea, the tea leaves will ferment easily under high temperature and constant temperature conditions

, vitamins will be destroyed in large quantities, aromatic oils will volatilize, and tannins and theophylline will be leached out in large quantities, which not only reduces the nutrition of the tea value, it will also make the tea juice aromaless, the tea tastes bitter, and harmful substances will increase.

4. Traditional Chinese Medicine

The acidic substances in traditional Chinese medicine are also easy to react with the chemical substances contained in the inner wall of the thermos cup, producing harmful substances that damage the body. It is recommended that traditional Chinese medicine should be made of pottery or enamel and can be easily held.