To me, they look like the perfect size to be a seed starter cup. Behind the cups is a plastic water bottle that I recycle into a mini greenhouse
I tore off the top cover on the top, pulled out the filter tha is in it and filled it with dirt and planted my seed. I then covered it in plastic wrap to help it get a good start and placed it in my window.
Do any of you have a special way you recycle these Keurig Cups?