Vintage East German Superfest set of 3 X .25L drinking glasses and 1 X .3 L glass for a total of 4 glasses. The .25L glass holds roughly 8.5 ounces. The marking on the 0.3L glass is very faint; I tried to photograph it but it's hard to see. The .25L glasses are more clearly marked. Overall good condition. There is a lump along the rim of the .3L glass - it is just a standard molding "defect" that seems to be fairly common on these glasses. Superfest is "unbreakable" glass that is 15x stronger than normal glass. You can still break it, it is just harder to break and not as fragile as normal glass.
THE SUPERFEST STORY:
In the mid-1970s, the DDR began to try to make conventional thin-walled commercial glass stronger and more heat-resistant. The goal was to have five times the lifespan of an ordinary drinking glass, but fifteen times lifespan was achieved. Other advantages included heat resistance, stackability, and lighter weight. The DDR regarded a super strong glass product as a key potential export and gave it priority for development. Originally called CEVERIT, the name was changed to Superfest to better appeal to foreign countries. However, Western countries were not interested in the idea of long-life glassware as it would be detrimental to their ability to sell replacements.
Production was initially limited to beer glasses but expanded to shot glasses, sekt (wine) glasses, vases, ice cream cups, and more. The main customer for Superfest glasses was the hospitality sector in the DDR.
We also have the following Superfest items: liquor / rocks glasses and sekt (sparkling wine), sold in sets of two.
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