IM come out here, I don't have milk bottles but, I have loads of white, thick plastic bleach bottles (gals.) I soaked and cleaned them to remove all trace/smells of bleach. I used them for plain water & fertilized water for my plants.
I've gotten rid of the plants but, still have stuff- tons of it. Got rid of the plants because I grew mine under lights (5 -3 shelf light stands and 15 special plant fixtures that space two fluorescent tubes farther apart for better growth. In fact the entire half basement is all stuff for plants. Even made up all my planting mix. When I do something it's always with great gusto., 14 years of it and tremendous electric bills convinced me to dump them.
Thank you DD
