the thomas wilson bottling company was established in rockport, massachusetts, in may 1907, by thomas wilson. it began producing its trademark twin lights soda (or "tonic", as it is still sometimes referred to regionally) the same year. the twin lights name and logo are taken from the twin lighthouses that sit at either end of thatcher island, located just off the coast of rockport (notably, the lighthouses are america’s last and only operating twin lighthouses, and have been designated as a national historic landmark).