After dispensing, the screw cap is replaced on the spout and {HEAD ~ the carton} stored until {TAIL ~ the next dispensing operation} 
stored until
After dispensing , the screw cap is replaced on the spout and { HEAD ~ the carton } stored until { TAIL ~ the next dispensing operation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL