1) this solar powered charger
02) Water fountains with built-in water bottle filling station
3) Subways where you can pay by recycling
4) A hair brush that is easy to clean.
5) Earbuds that won’t tangle
6) USB rechargeable batteries
7) Packing tape that is easy to open
8) Bike racks that don’t take up sidewalk space
Ref : Architecturen design
