Cup is a common item, whether it is some major festivals or small anniversaries, many people will choose to give the cup to others. Cup has the meaning of a lifetime, so some couples will give each other a cup, representing the hope to be with each other for a lifetime, and because the cup itself is fragile, it also represents the hope that the other side can take good care of and cherish it.
If you give the cup to your friends, it means that you want to be friends with them all your life. If you give the cup to someone who has a long history, it means respect. So there are many meanings of the cup, and different cups have different meanings.