Finally, the invention also includes an actuator comprising a plurality of slots, each one of the plurality of slots are in operative contact with one of the guide rails and comprising {TAIL ~ a passage} having a first opening and a second opening, {HEAD ~ the first opening} in functional connection with an aerosol valve on the aerosol can 
Finally , the invention also includes an actuator comprising a plurality of slots , each one of the plurality of slots are in operative contact with one of the guide rails and comprising { TAIL ~ a passage } having a first opening and a second opening , { HEAD ~ the first opening } in functional connection with an aerosol valve on the aerosol can
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