HI Nafis, you just gave us another smart and creative idea for the science contest. Super impressive and we really liked it. Thank you so much for educating us with your creative ideas and thinking differently. You idea is to recycle plastic bottles in vending machine and earn points through an app. Very interesting way to encourage recycling! Every day we are learning new things! Your diagram is also quite impressive with those 3D shading, color combinations and labels. Here is your idea and full contest entry for all of us to see in details: https://drive.google.com/file/d/1pMEycMLZNEqd5Yv3PoFJW_LNUvNRWBTp/view