This product is a set of four vintage avocado green Fire King Anchor Hocking coffee cups/mugs in the Mid-Century Modern style. Made of glass with a yellow color, these round cups are stackable and feature an impressed backstamp. Produced in California, these original coffee mugs are a perfect addition to any collection of decorative cookware and dinnerware. With a production technique of fused glass, these Fire-King cups are a classic piece of American glassware history suitable for all occasions.