When I was a kid the family had farm and retail dairy business. From cow to front door! Used to help the old man bottle it during school holidays. Then home for lunch where I couldn't stand the smell let alone the taste of it when it was put on the table to drink!
Heard a story way back that the workers on the Cadbury chocolate factory production lines were allowed to eat as much as they wanted as it passed them by. It didn't take long for new workers to cease doing tha!