It is usually considered unlucky to break a mirror, but it is actually nothing. It is similar to smashing the glass of someone elses house by playing football, only the glass is broken. We can reuse the broken mirror waste and transform it into a very creative and shiny pen holder. But don't deliberately break the mirror, after all, you still have to spend money to buy it.
First of all, break a mirror accidentally. If it is not completely broken, you can wrap it in a towel and use a tool to break it even more. Then it is more suitable to use a transparent square glass as a pen holder. Apply glue on the back of each piece of broken mirror, and then stick it to the side of the glass. Be careful not to get cut when pasting, and you can also wear gloves when doing it. It may be that if you break a small mirror, it won't be enough to cover the entire cup. You can make some small shapes at will, which will look better. Please also be careful when using it so as not to get cut.