A complete set of six of these 12 oz. Libbey Teardrop blue glasses is rare. I've had them safely packed away. It's time to share. Listed as late 20th Century, they are definitely vintage mid-century and have a quality feel and weight, with an ombre effect in the glass. They're great for summer lemonade or margaritas. They look great on a table with a vase of sunflowers. Fun fact; Libbey Glass Company was originally the New England Glass Company, founded in Cambridge, MA in 1818, then moved to Toledo, OH by Edward Drummond Libbey, William Libbey's Son, in 1888.