Is the vacuum flask without the 304 mark safe?

Usually when we buy a vacuum flask, there are a dazzling array of water bottlees in the mall, and it is difficult for us to judge which quality is good. At this time, many people will judge the quality of the water cup by looking at the stamped logo inside the thermos cup. Does the thermos cup with the 304 logo on the inner tank really use 304 stainless steel? Is the water bottle without the material stamped logo unsafe?

Let's start with the production process of the vacuum flask. The 304 or 316 logo we see is usually printed on the bottom of the inner tank. This is pressed by a factory with a machine. This is just a simple process. The inspection department has not mandated that the water cup must be printed with the logo of the water cup material, which has led to many manufacturers' fraudulent behavior, so even if the thermos cup is printed with 304 stainless steel, it is not necessarily made of 304 material.

So why don't some factories do this process?

One reason is that the material they use is really not 304 or 316 stainless steel, but a bad stainless steel material.

Another reason is that some big brands do not need to use logos to show their materials. For example, big brands like Zojirushi, Tiger, and Thermos do not have the logo of the water bottle.

Therefore, when we buy water cups, we must first pay attention to whether there are clear food-grade materials on the manufacturer and the packaging box. In addition, it is best to first choose the water cups of big brand manufacturers, the technology is mature and advanced, and does not cut corners.

The vacuum flask produced by Dongguan Zhanyi Commodity Technology Co., Ltd. is made of sufficient materials and exquisite workmanship. The material adheres to the combination of food-grade 304 stainless steel inside and outside, or a combination of 304 stainless steel outside and 316 stainless steel. The cup is kept warm for 18 hours and cold for 24 hours. The entire production link adopts AQL2.0 inspection standard, which is far higher than the peer standard. All links adopt a full inspection system to ensure that each product is a high-quality product. Customers from all over the world are welcome to visit our factory for inspection, and welcome to place orders for cooperation.