In Ancient Rome, what innovative 'advertising technique' did wine merchants commonly use to attract customers to their shops?

Before billboards and television commercials, ancient civilizations had their own ingenious methods of product advertising and retail promotion. From town criers in Roman marketplaces to branded pottery in Ancient Greece, the origins of marketing stretch back millennia. Test your knowledge about how merchants in antiquity promoted their wares and attracted customers in the bustling marketplaces of the ancient world!

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Painted serpents on their storefronts, as snakes were associated with Bacchus, the god of wine
Hung vine wreaths above their doors and displayed different colored flags to indicate the quality/type of wine available
Hired professional wine tasters to stand outside and loudly praise the flavors to passersby
Carved elaborate wine vessel sculptures that poured samples automatically when coins were inserted