All plastics will leach. All plastics are made of things that aren't good for you. The real question here is which plastics under what conditions leach bad enough stuff in large enough quantities to cause you significant harm. There are authorities and studies on both sides so that isn't much help. I choose to avoid letting my food and drink come into contact with plastic when I can. When I can't avoid it, I choose polyethylene which appears, from what I've read, to be the least problematical. Then I use my worry quota on things like the clown tailgating me while he's texting.