From kaphar; properly, a cover, i.e. (by implication) a tankard (or covered goblet); also white frost (as covering the ground) -- bason, hoar(-y) frost.
see HEBREW kaphar
I. כְּפוֺר noun masculine bowl (Late Hebrew id.; ᵑ7. כְּפוֺרָא) — bowl of gold or sliver, used in the temple (late), ׳כ 1 Chronicles 28:17 (4 t. in verse); plural construct כְּפוֺרֵי 28:17 (twice in verse); Ezra 1:10 (twice in verse); 8:27.