In ancient Rome, what retail innovation improved customer experience in the macellum (food market) and helped establish vendor brand identity?

Long before shopping malls and e-commerce, ancient civilizations developed sophisticated marketplaces and trading systems. From the Agoras of Greece to the Forums of Rome and the bustling bazaars of Mesopotamia, retail has ancient roots. This poll explores how early civilizations approached customer experience and brand identity in their marketplaces - concepts that still influence modern retail practices.

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Branded amphoras (storage jars) with merchant seals that guaranteed quality and origin of products like olive oil and wine
Loyalty tokens made of clay that customers could exchange for discounts on future purchases
Standardized price lists carved in stone at market entrances to prevent price gouging
Mobile food stalls with distinctive painted signs that traveled between different neighborhoods daily