A laboratory vessel is a type of container used in scientific experiments and research. A RETORT is a six-letter vessel that is typically used for distillation or other chemical processes. It is usually made of glass and has a long neck with a curved end. A VIAL is a four-letter vessel that is often used to store small amounts of liquid or powder. It is usually made of glass or plastic and has a narrow neck and a cap. Both retorts and vials are commonly used in laboratories for various experiments and research.