How long do ceramic cups need to be replaced?

While frugality is a virtue, have you ever thought about replacing our usual ceramic cups? As for this problem, it is estimated that we know very little, the following to introduce how long it takes to replace the ceramic cup.

If the ceramic cup has not been replaced for a long time, is it suitable? In fact, the ceramic cup will not be broken for ten years, unless the collision, and the anti-pollution ability of the ceramic cup glaze is relatively strong.

But the anti - pollution ability of glaze is relatively poor. If the ceramic cup is not damaged, there is no need to replace the general bacteria, viruses, in the dry air, a few minutes will die.