Abstract: An apparatus comprising a main receptacle, a first detector, a second detector and a processor; wherein said main receptacle is to hold articles for customer selection, said first detector is to detect presence of an article on said main receptacle, said second detector is to detect an article after said article has been removed from said main receptacle; and wherein the processor is to collect identification information of an article upon introduction of said article into the main receptacle during a serving session and to register introduction of said article, and wherein the processor is to check out or de-register said article from said serving session upon detection of presence of said article at said second detector.