Idea to combine human archaic streams to play with the new thoughts for sustainability:
In Store: Slotmachines accept used cups as a cover charge to win various prizes by gambling (discounts, vouchers, annual big prizes aso.)
Technology for those machines is available since the mid-nineties (Tomra Systems, SIEMENS or similiar manufactors).
Benefit: collected ressources, (almost) ready for recycling.
PS: I apoligize in advance if I touch existing ideas in this contest, which are submitted already. I'm late.
