I wonder if anyone remembers one of the most famously featured bottling lines was at the mythical Shotz Brewery in the TV show "Laverne and Shirley." These scenes were actually filmed in the real Schlitz Brewery on their bottling line.
Most people don't remember many of the other scenes, but they remember the scene in the opening credits where Laverne puts her glove on the bottle as it goes down the line.
People are just fascinated by how things are made. There's even a TV show devoted to that, too.