Pot
Pots" and other large vessels in the Bible represent facts and factual ideas, which serve as containers for truth the same way pots serve as containers for water or wine. Pots fill their function because they are hard, strong and impervious; facts are also absolute and unchanging, filling their function the same way. And pots must be filled to serve any use, just as facts must be filled with truth to serve any purpose. To some extent this meaning also applies to cups, bowls and other smaller vessels, though it is a little more immediate. Generally you don't fill a cup so you can store a liquid; you fill it to drink it. Smaller vessels then often take more of their meaning from the substance they contain, and in many cases ("cup" and "wine" especially) actually mean the same thing.
Apocalypse Explained # 1117
1117. Verse 7. How much she hath glorified herself and lived luxuriously, so much torment and mourning give her; for in her heart she saith, I sit a queen, and a widow I am not, and mourning I shall not see.
7. "How much she hath glorified herself and lived luxuriously," signifies how much of glory and consequent pleasure they have acquired for themselves from their dominion over heaven and over the world (n. 1118); "so much torment and mourning give her," signifies so much of infernal punishment and desolation (n. 1119); "for in her heart she saith, I sit a queen," signifies pride and boasting that heaven and the church are under their dominion (n. 1120); "and a widow I am not," signifies that they are not without defense (n. 1121); "and mourning I shall not see," signifies that they will never be in desolation and will not perish (n. 1122).