<1> PETE, aka PET (polyethylene terephthalate) Used for most transparent bottles, such as water, soda, cooking oil, and medicine bottles. Generally safe to use (not reuse); generally recycled.
this refers to reusing (refilling) as original, ie, a water, soda, container for human consumption
using the bottle for holding growing medium and fertilizer is OK
Vera Lothian wrote:An idea instead of bottle and to use soil would be the standard terracotta pots with the hole already in the bottom run a chain trough them with a bolt stopping the pot from sliding down the chain. The chain would also double up as a guide for the water so it dribbles down rather than just running trough. Some of the bonsai mesh could be used to stop the soil from falling out. I might have to see if I have enough pots....