Can stainless steel insulated cups make tea for drinking?

Stainless steel insulated cups are generally suitable for making tea and drinking.
Stainless steel insulated cups are usually made of polyvinyl chloride and are a metal product with high-temperature properties, commonly used to hold drinks such as tea and coffee. If a stainless steel insulated cup is used to brew tea, the tannic acid in the tea will react with the protein in the tea under high temperature, resulting in a substance that is difficult to digest and may cause irritation to the gastrointestinal tract, causing discomfort such as abdominal pain and diarrhea in patients. Therefore, it is recommended to use stainless steel insulated cups to brew tea and drink. In addition, it is recommended that patients should pay attention to the fact that stainless steel insulated cups are not always odorless. If stored improperly, they may deteriorate and have adverse effects on the body. It is recommended that patients promptly handle them.
In addition, it is recommended that patients avoid drinking overnight tea in their daily lives to avoid oxidation of tannic acid components in the tea, which can lead to changes in the taste of the tea. Patients can soak the tea leaves in warm water before brewing, which helps to reduce the tannic acid content in the tea. At the same time, it is recommended that patients should be aware that if their discomfort symptoms are severe, they need to seek medical attention in a timely manner to avoid delaying their condition.