Jack and Jill's vessel is a PAIL. It is a container with a handle, usually made of metal, plastic, or wood, used for carrying liquids or other materials. The term 'PAIL' is derived from the Latin word 'PALLIUM, ' which means cloak or covering. Jack and Jill's PAIL is most likely associated with the popular nursery rhyme, 'Jack and Jill, ' which tells the story of two children who go up a hill to fetch a PAIL of water.