The laver was made out of brass. The women brought their highly polished brass mirrors to make the laver. They did not have glass mirrors then. The mirrors revealed dirt and that was the purpose of the laver. The laver cleansed the priest, and the laver pictures the Word of God. The Bible is a mirror and when we look into it, our sin is revealed. We then need to confess that sin and be cleansed. Now you are not to confess your sin publicly; you go to Jesus Christ in private. That laver is in heaven.