How might we
Make people put "free things" back in their proper place after use?
When one steps into the sand, it leaves footprints.
Footprints are not only a mark, but also a memory. It documents every moment we spend on the beach. As we look back, we know where we came from.
So, what can be done to make people put free things back in the original place? By creating the footprints of free things.
Just like we know where we came based on the footprints, the customers will know where to put things back according to their own footprints. It triggers the memory!