*see pics there is visible rust on wire holder. One of the cups has staining, see pic. Otherwise this hard to find vintage set of ten Fire-King stacking mugs with wire holder are in very good condition. The mugs are avocado green in color and have a milk glass production style. They are suitable for hot and cold beverages and have features such as a C handle, break/chip resistance, and stackability. The mugs are an original product from Anchor Hocking and were made in the United States. They are vintage and have the Fire-King backstamp. The mugs should be hand washed to be safe.