The first recipe for jam is recorded in the first ever cookbook, “De Re Coquinaria”, compiled during the 4th Century AD in Rome. It wasn’t until the 19th Century however that jam making became a great industry, with English jam makers exporting jam all around the world. It was at this time that pots for jam became household items, with patented opening mechanisms often used to avoid sticky fingers. These ‘swing handled’ jam pots are much sought after today.