Do plastic water cups have a shelf life?

Do plastic cups have a shelf life? There is no doubt that there is, but we don't seem to see a description of "shelf life" in the description of which brand of cup, only some descriptions similar to service life. So can the service life of the cup be regarded as the shelf life of the cup?

The service life of a plastic water cup does not mean that it can be used for that long. After all, no one can guarantee that the purchased cup will not be damaged during use, so we can understand the service life as saying that it can be used within this period of time. Except for plastic water cups made of tritan, other plastic water cups made of PC, PP and other materials are actually mostly used for one or two years, because no plastic cup will not age. Of course, although tritan plastic cups are resistant to aging, The aging performance is better than that of other plastic cups, but they will age after all. Once the cup ages, it means that it has passed its shelf life, and plastic water cups that have passed their shelf life can no longer be used. It will cause harm to the human body. Therefore, when the plastic water cups we use are no longer transparent, or even yellow and brittle, or the bottle body is slightly deformed, it means that the plastic water cups have begun to age.