What details should be considered when choosing a thermos cup?
First, look at the body of the thermos cup.
In daily life, when we choose a thermos cup, we might as well carefully distinguish it from its body. A good thermos cup not only has very strict production requirements, but also has high craftsmanship requirements. Therefore, the body of this thermos cup is usually smooth and thick, while the inferior thermos cup has a thinner wall and a rough surface, and the feel is very poor. At the same time, we can also observe whether the mouth of the thermos cup is smooth and whether there are welds.
Second, look at the material selection of the thermos cup.
The thermos cup is generally made of stainless steel plus a vacuum layer. There are many kinds of stainless steel on the market, such as 201 stainless steel, 202 stainless steel, 304 stainless steel, 316 stainless steel, etc. Among them, 304 stainless steel and 316 stainless steel are common materials for thermos cups in life. Therefore, when choosing a thermos cup, carefully observe the inner bottom of the thermos cup. If there is a steel stamp with the words 304 or 316, it is qualified.
However, there are still subtle differences between the two. Compared with 304 stainless steel, 316 stainless steel has better heat resistance and corrosion resistance due to the different contents of metal elements such as chromium, nickel, and manganese. Even under very harsh conditions, 316 stainless steel thermos can be used freely. In addition, if you often use a thermos to make milk tea, coffee and other drinks, it is recommended that you choose a 316 stainless steel thermos. It is worth mentioning that the price of a 316 stainless steel thermos is also higher than that of a 304 stainless steel thermos.
Relevant research data show that long-term use of inferior stainless steel as a thermos can cause pharyngitis, respiratory tract infection or mucosal damage, and even affect liver and kidney function. Therefore, it is recommended to buy a thermos from a regular channel, and do not endanger your health for a small profit.
The third is to look at the performance of the thermos.
Choosing a thermos is not only about the style and color, but more about durability, which depends on whether its thermal insulation performance is good. The reason why the thermos cup keeps warm is that the space between the inner liner and the cup body is vacuumed, forming a vacuum layer that does not conduct heat, so that the water inside can delay heat dissipation to keep warm.
Of course, you can't know the specific insulation time just by looking at the appearance of the thermos cup. You might as well fill the thermos cup with boiling water and tighten it. After a few minutes, touch the cup body and the bottom of the cup with your hand. If you feel warm, it is enough to show that the performance of this thermos cup is not very good.
Fourth, smell the thermos cup.
When choosing a thermos cup, we might as well open the lid of the thermos cup and smell it. A qualified thermos cup uses food-grade materials for its silicone gasket, sealing and leak-proof, and basically has no smell.