The bottled water claim has been debunked.
While BPA does leach into water (only in hard-plastic containers like the polycarbonate Brita pitchers, many plastic food jars, or the 5 gallon cooler bottles, not the soft PET bottles) over a long period of time, the dose is negligible.
To reach the EPA's allowed safe dose of BPA, a child would have to drink something like 570 liters (150 gallons) a day, and an adult would have to drink 4,140 liters (1,094 gallons) a day. While that amount of BPA won't cause any harm, the amount of water involved will kill you.
On the PET side (soft-plastic .5 liter, 1.0 liter and similar), there are claims that suggest heat, such as storage in a car, will release dioxin. The trouble is, the conditions required for dioxin release involve combustion at temperatures above 700 degrees F, so both the bottle and the car it's stored in will be rendered unusable before any dioxin is released.