This is a handmade drinking glass made from borosilicate glass, the colors are made by the fuming of silver and gold, and will be most noticeable with a darker liquid. This piece is approximately 9” tall, 3.5” at its widest, and holds about 16oz. This particular piece has a tiny flaw on the lip and is priced accordingly. The flaw does not effect its function, it’s just not perfectly round, these are after all, handmade. All my glass has been properly annealed in a glass kiln.