Those things are not in my budget unless perhaps used. So, I will wait until I can invest in that type of equipment before starting. The effects are well known enough (through several studies, not just one) for many manufacturers to have switched to BPA-free plastic. What they don't tell the consumer, however, is that they often replace BPA with another estrogenic plasticizer as bad or worse. That said, I mentioned the study not to change the ways of anyone in this forum--only because you asked about it and because I felt it good to explain why I personally don't want to use plastics unless necessary and, where I must, with lower-temperature oils that won't cook in plastic. My own view is that this is not the wrong fight. It's just one of many, a drop in the bucket. We live in a very imperfect world that I fear will get worse at a faster pace than it will improve. But that my landlord's landscapers spray Roundup outside of my organic veggie garden and thirdhand smoke makes its way onto my garden doesn't suggest to me that I should stop my organic gardening efforts and go "hog wild" with chemicals (e.g., pesticides) and cancer-causing substances. My efforts will reduce the overall burden on my body. But, again, there is only so much that each one of us *can* do. I understand that we are each more capable of some changes than others. Carpooling for you may be easier than using stainless in parts of the soaping process whereas stainless would be an easier change for me to make. I mentioned the study not to twist anyone's arm, only to explain my own questions and concerns for the process I am trying to design for myself.