Vaseline Glass Ribbed Sherbert Cup With A Fluted Base.

This particular piece appears to be a sherbert cup or champagne glass, likely produced by the Hocking Glass Company, which was a prominent American manufacturer of pressed glassware. The 'circle' pattern, characterized by the fluted base and ribbed bowl, is a common design found in their Vaseline glass production, often dating from the 1930s to the 1950s.