a location for bleach where a fabric softener is located it is to be understood that the protuberances 28 and 32 are to engage with certain recess or recesses formed within the housing 12 so that only that particular reservoir 22 24 or 26 can be located at a specific location instead of the protuberances 28 30 and 32 there may be used another form of marking means such as a radio frequency identification rfid tag that conveys information about the container size to the cpu 62 which when combined with stored sensor information about dosing history would allow the machine to provide supply level statistics and alerts to the user supply reservoirs 22 24 and 26 are noted to be at a height above the wash basin 18 in order to minimize the structure that is required for the dispensing of the contents contained within each of the reservoirs 22 24 and 26 gravity is to be used if these reservoirs are located at a height above the wash basin 18 flow from the reservoirs 22 24 and 26 can occur by gravity not requiring the use of any separate pumping devices the supply reservoir 22 has a dispensing conduit 34 supply reservoir 24 has a.