There is a maker's mark that I am unable to identify on the bottom. If anyone is familiar with the mark, I would appreciate any input.
This set of 2 new Libbey glass Imperial Blue-misty Blue cooler tumblers features a square bottom design and a 16oz capacity, making them perfect for all occasions.
CORDIAL size TIFFIN --- CHATEAU --- CUT GLASS STEM/GOBLET - Right at 5 1/4" Top to Bottom with the #17431 Square Base STEM. -- Cordials are IMPOSSIBLE TO FIND. just a fact.