Which mythological product launch was accompanied by extensive 'user testing' before being released to humanity?

In the world of mythology and folklore, divine beings and heroes were often associated with introducing revolutionary 'products' to humanity. These mythological product launches transformed societies and became central to cultural narratives across civilizations. Test your knowledge about these legendary innovations and how they mirror modern product introduction strategies. Would you have recognized the true value of fire if Prometheus pitched it to you?

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Pandora's Box, which Zeus had tested with multiple divine focus groups to ensure maximum curiosity appeal
The Golden Fleece, which underwent rigorous quality assurance by the gods before Jason's quest
Daedalus' wings, which he personally tested and refined before giving the final version to his son Icarus
Thor's hammer Mjölnir, which was released immediately after forging without any preliminary testing