Yes it's true. While it takes a lot of energy to recycle it, at past about 100 degrees farenheight(sp?) these bottles start to off-gas carcinogens. Yes, that means even in a car on a hot-day they start getting dangerous, get a thermos, and a tap filter, that's what this water is anyway, there's a very popular one at the moment, but I can think of the exact name, eco-bottle, or something like that.