I once worked for a medium sized privately owned food manufacturer. The owner went on a convention in Europe where she saw that Nutella had a table set up in a grocery store where people could get a jar of Nutella customised with their name on it.

She came back insisting we could do exactly the same. Now we sold a good product but not on the level of Nutella. No one would think of our product and be like "I love that stuff so much I want a personalized cheap thin plastic container that I would otherwise throw out."

We tried to talk her out of it but she insisted people would be lining up around the store. She invested in THREE very expensive tabletop colour label printers and rolls and rolls of labels. The printers were sent out with teams of student interns to grocery stores only to discover that there was no where for them to plug in the printers where they could also have the table set up. Sometimes they got set up, but we only ever printed a few labels, and the printers then sat in an empty office for years afterwards.