Whether the thermos cup can make coffee or not depends on the material of its inner liner. At present, most of the inner liner of the thermos on the market are stainless steel, but stainless steel still has advantages and disadvantages. The current stainless steels on the market are as follows:
201 stainless steel can only be used for garbage products now. It can only be used for hot water. It has poor corrosion resistance and cannot be used for tea, milk, juice, coffee and other beverages. After a long time, it will corrode the inner liner of the thermos cup, dissolve metal elements, and harm the body. cause harm. So, if you see the 201 material, don’t buy it!
304 food grade stainless steel already has good corrosion resistance, high temperature resistance of 800 ℃, the cost is cheaper than 316, it is a cost-effective material, and there is no problem in daily use. However, 304 is also divided into good and bad, so try to choose some brand-guaranteed ones when purchasing. I bought it with a pdd before. I have used it, so I can’t be greedy for a small price.
316 stainless steel high-grade products are made of 10% nickel to make stainless steel more durable and corrosion-resistant. This stainless steel is called 18-10 stainless steel, which is “medical stainless steel”. There is no metal ion precipitation at all, and it can withstand 1200-1300 degrees. high temperature. This material is safer than 304, and it will not precipitate metal elements after a long time. It can also be used for coffee, which is more corrosion-resistant.
In summary, it is recommended to use the material with the inner tank of 316 for brewing coffee, which is more corrosion-resistant and avoids the precipitation of metal elements.
