Change in mindsets, establishing norms needed to get diners to return their trays, say experts Toggle share menu Advertisement Change in mindsets, establishing norms needed to get diners to return their trays, say experts Trays and used utensils were left behind by diners when CNA visited Clementi Market and Food Centre on Feb 4, 2021. (Photo: Ang Hwee Min) 19 Apr 2021 07:50PM) Share this content Bookmark SINGAPORE: Beyond initiatives to nudge diners into returning their trays, an overall change in people's mindset is needed for such plans to work, said observers. It was announced on Friday (Apr 16) that coffee shops and food courts will get funding to install tray return facilities.