An apparatus for imparting an organoleptic quality such as smell or taste to a recipient product (2) such as tobacco is disclosed. The apparatus uses a sensate substance obtained from a donor product (8), such as mint. The apparatus has a donor product storage chamber (9) and a recipient product storage chamber (1). The apparatus is arranged to allow a fluid to circulate repeatedly between the donor product storage chamber and the recipient product storage chamber so that at least one sensate substance obtained from the donor product is conveyed from the donor product storage chamber into the recipient product storage chamber and into contact with the recipient product. Monitoring and control of the process is also disclosed.
