Pepsi and Coke sell bottled waiter that is municipal tap water in most countries. But, it is tap water that is put through reverse osmosis and filters. You can do that at home, but it would be costly.

Why would one single out water in plastic bottles? Consumers use many products in similar plastic bottles, and it's in plastic coatings in canned foods that are retorted for long periods at very high steam heat (which allows the same compounds to release into the canned products). Additionally, we are subjected to cancer causing compounds releasws in plastics used in microwaves, and from teflon cookware and teflon in microwave pop corn bags.