My best friend works in a research lab and I must say that plastic scares me too! After all I've heard my general consensus in regards to plastic is: You can put lipstick on a pig but its still a pig. No matter what they say the plastic is made of or what # it is... My logic is; it will still contain a ton of endocrine disruptors whether measurable or not... However, I'm a hypocrite because my buddies all use igloos, I drink it all the time and it's damn good beer.. I myself prefer stainless steel BIAB. my .02