PET bottles can be used to make many types of objects: new PET bottles, pens, bags, coats…but the most easy way is to simply press them into blocks to send off by container.
CAVE: Separate the lies from the bottles as it is not the same type of plastic. Like hard plastic, it can be ground into bits to make new objects.
You can use PET bottles to create daylight without electricity, as this documentary shows:
You can simply dispose of them by compacting and sending them to specialised industries.
You can use PET bottles to disinfect water in a natural way to make it drinkable. Very easy way to make drinking water.