Wyn is explaining that this laver (water basin) was used for cleansing hands and feet before entering the Holy Place, inside the tabernacle. God told the Israelite women to give their mirrors to make it out of the copper and bronze that their mirrors were made of. Isn't that "ironic"? It's a cool reminder through the laver that the inner beauty of purity (washing) is real beauty, not the external beauty that we worry about by examining ourselves in the mirror.