Sipper's Aid is a term used to describe a STRAW, which is a thin tube made of plastic or other material that is used to suck up liquids. It is commonly used to drink beverages such as juice, soda, and water. The term Sipper's Aid is derived from the fact that it aids in sipping the liquid. Straws are also used to prevent spills and to keep the drinker's mouth away from the surface of the container.