SPL Polyols Inc., a manufacturere of ingredients for tge confectionery, pharmaceutical, and oral-care industries, buys corn syrup from farmers in the Midwest. SPI converts the corn syrup into sorbitol solution, which sweetens and adds bulk to the cool mint listerine. The syrup is shipped to SPI's Bew Castle, Delaware, facility for processing and then delivered on a tank wagon to lititz. The whole process, from the time the corn is harvested to when it is converted into sorbitol, takes about a month