This tumbler is an antique Octagon tumbler made by Imperial Glass! It is iridized in such a neat way in that the most color is laid within the pattern! Very artsy!
I’ve not seen one of these in purple before. They apparently come ground on the bottom or with a collar base. Here is a collar base.
Made in the early 1900s.
~NO CHIPS OR CRACKS~
4 1/8 inches tall