From an unused root (meaning to be convex); a goblet; by analogy, the calyx of a flower -- house, cup, pot.
H1375. gabia
גָּבִיעַ noun masculineGenesis 44:12 cup, bowl — ׳ג 44:12 2t.; construct גְּבִיעַ 44:2; suffix גְּבִיעִי 44:2; plural גְּבִיעִים Exodus 25:34, גְּבִעִים 25:33; 25:33 4t.; suffix גְּבִיעֶיהָ 25:31; 37:17; — cup (of Joseph) Genesis 44:2, 12, 16, 17; plural cups (of golden candlestick in tabernacle) Exodus 25:31, 33 (twice in verse); 25:34; 37:17, 19 (3 t. in verse); 37:20; bowls Jeremiah 35:5 וכֹסוֺת יין מלאים גְּבִעִים.