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Philipp Engelkamp would rather not let anyone look into the closet. At the very end of the tour, Engelkamp has stopped in a corner of the production hall in front of the steel locker and carefully opens the door so that no one can see the bottles inside – they have the customers’ names on them. Engelkamp pulls one out and holds it up in the air. The content is clear as water, smells of candle wax and – can fly: “Here it is, clean fuel,” he says, “so everyone can see that it really exists.”
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