9 labels is too many. Also, those pictures are kind of hard to match. It needs to be dead simple: number of labels = number of bins available. Maybe number of

9 labels is too many. Also, those pictures are kind of hard to match. It needs to be dead simple: number of labels = number of bins available. Maybe number of labels can be more than number of bins by 1 or 2 at most. Secondly, use numbering instead of icons. Numbering is dead simple to match, icons require effort to match on the box against the picture on bin. In the case of saran wrap: the box should clearly say #2 for box and #3 for contents (saran wrap). That would resolve the case you mentioned.