Proprietary and revered French quinquina in less-sweet (blanc) and sweet (rouge) varieties. Note that a recipe that specifies "Lillet" without also specifying "rouge" or "sweet" always intends Lillet Blanc which, for many years was their sole version. Perhaps attempting to enter Dubonnet's market, they produced a red Lillet which has never sold as well, either in America or abroad.
Generally available. Produced and sold in France.