Mark in Ohio
As a kid in the 1960s, all of the local sixth graders got to take a tour of our local [Chillicothe’s] Carrolls Potato Chips factory and watch the transformation from spuds to chips. They let us have a single warm chip coming down the conveyor belt to the bagging area and we each got a little nickel bag of chips for the bus ride back to the school along with an admonition to only buy Carroll’s chips at the store. In the 1980s they became Herr’s, but the factory is still in town.
In the 1970s, I went through the Heineken factory in Amsterdam a number of times, it was the cheapest breakfast in town: all the beer you could drink, a plate of cheeses, and your guilder admission was donated to UNICEF.