. A small jar for water, oil, etc.
1. (בַּקְבֻּק, H1318, 1 Kings 14:3, KJV “cruse,” RSV “jar”; alternately Jeremiah 19:1, 10, KJV “bottle,” RSV “flask”). A water decanter with narrow neck. Such a jar filled with honey would make only a trifling gift from a king (1 Kings 14:3).
2. (צְלֹחִית, H7504, 2 Kings 2:20, KJV “cruse,” RSV “bowl”). An open shallow bowl to hold salt, for salt would cake up in a jar.
International Standard Bible Encyclopedia (1915)
kroos: A small earthen vessel or flask, usually for holding liquids: tsappachath; as water, 1Sa 26:11,12,16; 1Ki 19:6; it being porous, the liquid is kept cool; also for holding oil, as in 1Ki l7:12,14,16.
In 1Ki 14:3 ("a cruse of honey") the word baqbuq, would be better rendered "bottle," doubtless deriving its name from the gurgling sound of issuing liquids. In 2Ki 2:20 tselochith, is not a jar or flask, but a dish, or platter, for salt or other substances.