On the topic of PETE, yes- truth and hype. Same way there is with BPA and eventually with nickle and chromium from stainless, it isn't enough to matter for an adult human.

And when I talk about scuzzed Nalgenes being more likely to leach, remember, it is the inside surface that is important here. Outside isn't in contact with your water, so unless you've been using it to store something like nails in or scouring it with steel wool, you'll be fine. I use mine every day, and last time I had blood work done my hormones were fine.

And they should all be hand washed. Dishwashers suck on water bottles.