A cool midcentury Esso Tiger Fire King Mug set. The set of 6 mugs include Fire King by Anchor Hocking milk glass coffee mugs. The Esso tiger is featured on one side. You received a mug when you filled up your tank, the Esso slogan was, "Put a Tiger in your Tank". Each coffee cup measures approximately 3 3/8" tall x 3 1/4" at brim, and are in very good vintage condition with no chips or cracks. Sold as a set of 6.