Vintage Federal Glass Colonial Iridescent 12 Ounce Flat Tumblers, Set of Four

These rainbow iridescent 12 ounce glasses were made by Federal Glass in their Colonial Iridescent pattern in the 1960's.  They feature a textured easy grip outside with an iridescent sheen that reflects different colors at different angles.  It's hard to capture the iridescence well in photos, but they are colorful.

Each measures 5 1/2" tall and 3 1/4" wide.  All are in pristine vintage condition with no chips or cracks, and little to no wear marks.