Brass and iron as in Isaiah 48:4 and Daniel 7:19 signify what is hard.

In Genesis 4:22, brass signifies natural good. (Arcana Coelestia 421)

In Numbers 21:9, this signifies the Lord's divine natural. (Apocalypse Revealed 49)

Brass also signifies the good in man's natural and the sensuous in the Lord. (Arcana Coelestia 197, Apocalypse Revealed 49, Apocalypse Explained 705)

(Odkazy: Apocalypse Explained 70)

Food and drink in the Bible represent the desire to be loving and the understanding of how to be loving, gifts that flow from the Lord and sustain life. Since a table is where we receive these gifts and make them a part of us, it follows that tables in the Bible represent receptacles of good things from the Lord, the places He can fill in our hearts and minds. In the contrary sense, tables can also represent receptacle of evil from hell; we can allow ourselves to be filled with those as well.