We carry an inventory of natural menthol crystals, natural essential oils and bittering agents used to denature alcohol. Our natural menthol crystals are always USP spec coming from ISO certified manufacturing facilities. Our natural essential oils include menthol oil, peppermint oil, spearmint oil, eucalyptus oil, linalool oil, and anethole. They are shipped in 210 L galvanized drums, but if you need a smaller unit, just let us know. In addition, we carry NF grade Denatonium Benzoate,"the low toxic bittering agent". Denatonium Benzoate is a substitute for brucine sulfate, sucrose octaacetate etc.When added to products, it deters ingestion by humans, pets, rodents and livestock.