Which ancient product innovation revolutionized commerce by allowing merchants to display exact quantities of goods rather than approximating by weight or volume?

Before modern technology and mass production, ancient civilizations were remarkably innovative in their product designs and manufacturing techniques. From the sophisticated metallurgy of Damascus steel to the durable concrete of Rome that still stands today, ancient peoples developed products that sometimes surpassed modern equivalents. This poll tests your knowledge about one of the most influential product innovations from the ancient world that changed commerce and daily life across multiple civilizations.

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Standardized clay amphorae with volume markings
The invention of standardized coins with consistent precious metal content
Glass containers with measured gradation lines
Bronze balance scales with calibrated weight sets