box, vial

Concise Bible Dictionary:

Earthenware, or glass, flask or bottle for oil or perfumes (2 Kings 9:1, 3). See ALABASTER.

Strong’s Dictionary of Hebrew Words:

Transliteration:
pak
Phonic:
pak
Meaning:
from 6379; a flask (from which a liquid may flow)
KJV Usage:
box, vial