In a Shenzhen vape factory, workers test up to 10,000 vapes daily by puffing on them to ensure quality and functionality. This process was revealed in a documentary by the YouTube channel Machina, which visited a factory in Baoan, Shenzhen—an area that produces around 80% of the world’s vapes. The testing procedure includes pressure tests and suction simulations, but the most striking method involves workers inhaling from each device to check its performance and flavor. One worker disclosed that

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