History of the dimple glass mug?

nobody I know seems to be able to find when the glass dimple mug was first introduced – even some of the brewers!

SymphonyOfSound
on November 30th, -0001

I found this, if its any help. It says the dimples were added to save money by saving glass. They came about in the 1920’s. Anyway, here’s the article.
http://news.bbc.co.uk/1/hi/business/1239…
Zoe
on November 30th, -0001

“Jug” glasses, or “dimple mugs”, are shaped more like a large mug with a handle. For added strength, they are molded with a grid pattern of thickened glass on the outside, somewhat resembling the segmentation of a WWII-era hand grenade. These glasses are rarer than the other types and are regarded as more traditional.

You may want to research “Jug” glasses.
Good luck!
Rob
on November 30th, -0001

Nearest I can find is the introduction of glass “steins” (with a lid) in Germany in the late 18th century when they became economic to produce.

Aleš Lombergar