Does an unused thermos cup have a shelf life?

In a previous article, we talked about the lifespan of a thermos cup in daily use and what is its typical service life? There is no talk about the shelf life of unopened thermos cups or thermos cups that have never been used. There are many articles on the Internet that simply talk about the shelf life of thermos cups. It seems that it is generally said to be 5 years. Is there any scientific basis for this?

Before continuing with this question, I have some opinions to express. I have been engaged in the thermos cup and stainless steel water cup industries for more than ten years. During this period, I have written more than hundreds of news and copywriting articles about water cups. Recently, I found that there are many promotional water cups on the Internet. The copywriting has obviously plagiarized the content of our published articles. After tracking, we found that some of them are practitioners in the water cup industry, and some of them are actually people from some well-known platforms. I would like to declare that my article can be borrowed. Please write the source. Otherwise, we reserve the right to take legal action once discovered.

Regarding the shelf life of a water bottle that has never been used, I found that the 5 years commonly mentioned on the Internet has no scientific basis and is probably based on the author’s work experience. Taking the stainless steel thermos cup as an example, the materials that make up the stainless steel thermos cup basically include the following types: stainless steel, plastic, and silicone. These materials have different properties and different shelf lives. Stainless steel has the longest shelf life, and silicone has the shortest shelf life.

Depending on the storage environment and temperature, the shelf life of unused stainless steel thermos cups is also different. Take plastic materials as an example. When various water cup factories currently produce stainless steel thermos cups on the market, plastic is often used on cup lids. The most commonly used plastic for cup lids is PP. Although this material is food grade, if it is stored in an environment It is relatively humid. According to experiments, mildew will form on the surface of PP materials in such an environment for more than half a year. In an environment with strong light and high temperature, PP materials will begin to become brittle and yellow after more than one year. Even if the storage environment is very good, silicone, the material of the silicone ring used to seal the water cup, will begin to age after about 3 years of storage, and may become sticky in severe cases. Therefore, the 5 years commonly mentioned on the Internet is unscientific. The editor gives you a suggestion. If you find a thermos cup that has not been used for many years and has been stored for more than 3 years, it is recommended not to use it. This is not a waste. You may think you have saved dozens or even hundreds of dollars, but once The damage caused to the body caused by the qualitative change of the water cup is often not something that can be solved by tens or even hundreds of dollars.