Ugh, so how do you store water in cars?
On my way out of the house, I grab a couple of liters of filtered tapwater in old nalgenes from the garage fridge, and drop them in a soft side cooler, and toss it in the car. Stored in the car are 5 liters in platypus bags. regarding plasticizer leaching, see Blast's wisdom. There is a lot of noisy bad science out there, cuz advancing a cause is of more newsworthiness than is the truth.