Market environment: At present, there are many brands and materials of thermos cups produced in the market, and many people have doubts when buying thermos cups. I don't know what kind of thermos cup is better. Is the material of thermos cup harmful to human body? Generally speaking, the inner container of a thermos cup is made of stainless steel, ceramics, purple sand and glass. Different types of liners have different thermal insulation effects.
Benefits: Stainless steel thermos cups are the most common thermos cups on the market at present. The cost and price of this kind of thermos cup are not high, but the insulation effect is good and the cost performance is high. The stainless steel liner used in stainless steel thermos cup should be made of food-grade 304 stainless steel, otherwise the stainless steel thermos cup will not meet the standard. There is iron in the stainless steel thermos cup liner, which is one of the elements we need to consume every day.
Glass thermos is also a common type of thermos. Glass thermos cups are safer than those made of other materials, because the glass liner of glass thermos cups is sintered from inorganic silicates, and the physical and chemical properties of these silicates are relatively stable, so it is not easy to produce bad impurities during production and use, and it will not affect human health.
Purple sand thermos cup is one of the less common thermos cups. The vacuum cup for kitchen household products made of purple sand not only has the function of heat preservation, but also has the function of health care and conditioning. The inner container of the thermos cup is generally made of pure natural purple sand mud, and the outer shell is generally made of fall-resistant stainless steel. Purple sand thermos cups have many advantages, such as strong adaptability to cold and heat, health and durability, and no hot hands.
Ceramic thermos cups are rare in the market now. Ceramic is a completely harmless material, so many kitchen utensils such as ceramic kitchen utensils have chosen this material. Generally speaking, both metal thermos cups and plastic thermos cups have some potential safety hazards, and long-term use is in danger of ingesting undesirable metal substances. Ceramic thermos cups are completely harmless and suitable for long-term use.
Long-term use of stainless steel thermos cups will not do any harm, nor will it cause cancer to the human body because it contains heavy metals, but different thermos cups have their own advantages and disadvantages.
Disadvantages:
Don't use stainless steel thermos cups to make tea, which is harmful to human body. Why is it easy to lose vitamins when making tea in stainless steel thermos cups? Usually tea contains a variety of vitamins, in addition to a large number of theophylline, tea sesame oil, tannic acid. Soaking tea in stainless steel thermos cup in high-temperature water for a long time will lead to the destruction of many vitamins in tea, a large amount of tannic acid and theophylline oozing out at the same time, and a large amount of tea sesame oil evaporating. In this way, many ingredients in many tea leaves are lost, and the nutritional value of tea leaves is reduced, which will make the tea juice tasteless.
Ceramic thermos cups also have several disadvantages. First, ceramics are fragile and not suitable for the elderly and children. Ceramic thermos cups are generally airtight and are not suitable for outdoor use. At the same time, the thermal insulation performance of ceramic thermos cups is relatively poor compared with stainless steel and glass thermos cups.
The inner container of purple sand thermos cup is relatively expensive, so the cost of purple sand thermos cup is also relatively high, and the price of thermos cups sold by household brands in the market is also relatively high, which is not suitable for bulk purchase.
The biggest disadvantage of glass thermos cups is that they are fragile. Glass is fragile. If you need to carry it with you or go out for a long time, it is easy to break.
Summary: Generally, the common thermos cups on the market are made of stainless steel or glass. Relatively speaking, this kind of thermos cup not only has good heat preservation effect, but also is not easy to break. Suitable for the elderly and children, but also suitable for carrying out, so it can not be used for drinking tea.