Therefore, it can be concluded that the field of plastic trays has been widely investigated, especially from a technological point of view, with the aim of evaluating their basic functions towards food content. Indeed,not so many studies dealt with plastic trays' life-cycle environmental assessment, in particular, for what concerns to foamy PS trays. From this
point of view, a gap in the literature was observed, thus emphasising upon the need for more LCAs on this area to be performed.