Laver : (Heb. kiyor), a "basin" for boiling in, a "pan" for cooking (1 Samuel 2:14), a "fire-pan" or hearth (Zechariah 12:6), the sacred wash-bowl of the tabernacle and temple (Exodus 30:18,28; 31:9; 35:16; 38:8; 39:39; 40:7,11,30, etc.), a basin for the water used by the priests in their ablutions.
That which was originally used in the tabernacle was of brass (rather copper; Heb. nihsheth), made from the metal mirrors the women brought out of Egypt (Exodus 38:8). It contained water wherewith the priests washed their hands and feet when they entered the tabernacle (Exodus 40:32). It stood in the court between the altar and the door of the tabernacle (Exodus 30:19,21).
In the temple there were ten lavers used for the sacrifices, and the molten sea for the ablutions of the priests (2 Chronicles 4:6). The position and uses of these are described 1 Kings 7:23-39; 2 Chronicles 4:6. The "molten sea" was made of copper, taken from Tibhath and Chun, cities of Hadarezer, king of Zobah (1 Chronicles 18:8; 1 Kings 7:23-26).
No lavers are mentioned in the second temple.