In Japan they found out a funny way to use PET caps. The company Merry projects created the “Merry farming kits” which includes a tablet of compressed dry soil, that’s just the right size to fit inside a standard plastic soda bottle cap, along with basil seeds for planting.
Apparently they can be find anywhere in Japan, from bookstores to the street (they make several guerrilla campaigns).
I think this is amazing, they created a way to reutilize caps with a fashionable and useful item. They’re basically turn garbage into a beautiful plant :) And nowadays urban gardening is so trendy!!! Of course you could also make a necklace out of the caps, but it would look pretty ugly! :p
Check more photos here.