The laver was another important part of the Tabernacle. It was made of brass. But it was not made of any brass. It was made of the brass from the looking glasses or mirrors of the women. This brass was of particularly pure metal. It would allow people to see their reflections in it. You can read about the laver in Exodus 38:9 and Exodus 30:18-21.
The priests had to wash at the laver before they could serve in the courtyard of the Tabernacle. They were already members of the priesthood but they still had to wash before they could serve in the worship.
We are told in James 1 that we are to look into the perfect law of liberty and continue in it. We are told this is similar to looking in a mirror. The laver may represent the Word of God, which is the Word of Christ. It is the Word that will show us what to do to be pure and clean in the eyes of God.
The water contained in the laver is also representative of Christ. When we are Christians we still need to be washed clean when we sin. In 1 John 1:9, we are told that if we confess our sins, he will cleanse us from those sins, just as the priest was cleansed when he went to the laver to wash.
It is amazing how God gave us pictures of the church and Christ in the Tabernacle. It shows that God is the One True God.