Will the internal coating of stainless steel water bottles cause harm to the body?

Stainless steel water cups have gone through a history of several decades from the last century to the present. From the early days with a single shape and poor materials, now they have a variety of shapes, and the materials are constantly iterated and optimized. These alone cannot satisfy the market. The functions of water cups It is also developing and changing with each passing day, making it smarter and more convenient for people’s daily lives. Not only that, in order to meet the various daily use needs of stainless steel water cups, coatings of various materials have also begun to be added to the inner wall.

Beginning in 2016, some buyers in the international market began to study adding coatings to water cups in order to increase the purchase point of their products. Therefore, some water cup production factories began to try to process some imitation ceramic effect coatings on the inner walls of water cups. However, in 2017, The phenomenon of a large number of order cancellations in the international market is due to the immature ceramic paint coating process, resulting in insufficient adhesion of the coating. It will fall off in large areas after being used for a period of time or after special drinks. Once the peeled off coating is inhaled, it will cause The trachea is blocked.

So as of 2021, there are still a large number of stainless steel water cups with internal coatings on the market. Can these water cups still be used? is it safe? Will the coating still peel off after using it for a period of time?

Since a large number of order cancellations in the international market in 2017, these water cup factories that use coating processes have begun to reflect and develop new coating processes through many attempts. After a large number of experimental tests, these factories finally found that using a firing process similar to the enamel process, using a Teflon-like material coating and firing it at more than 180°C, the inner coating of the water cup will no longer fall off after use. It has also been tested for up to 10,000 times of use. At the same time, this material meets various food-grade tests and is harmless to the human body.

Therefore, when buying a coated water cup, you should ask more about what kind of processing method it is, whether the firing temperature exceeds 180°C, whether it is made of imitation Teflon material, etc.