Pretty glassware with vacuum double wall. Mine (cappuccino) came in original packaging from Zwilling and says it's mouth blown, but made in China. It is fragile unlike Corning glassware. I accidentally dropped it from couple inches above another ceramic cup and it broke immediately. I would not use metal rack, spoon, etc. Still 5 stars as I don't think there could be any improvement in order to prevent it from breaking. Just have to be careful with any double walled design.