I used to buy bottled water thinking it was healthier than the city water coming through my faucet. The cheap, 1-gallon containers the water came in actually smelled of plastic and the water did to... and then there's all the plastic waste. Tricky thing is that the water coming out of one's tap isn't necessarily better or safer. City water often smells like chlorine (I can smell it when I ask for water at a restaurant) and is probably laced with gazillions of other chemicals I'm not aware of. I have a well at my house, but even well water is often contaminated with chemicals these days, such as oil from the oil pipeline break that happened a few miles from my house. As a result, I have a reverse osmosis water filter system installed for drinking water...and guess what it's primarily made of? Plastic. Doh! It's no wonder people give-up trying to reduce plastics in their life.

Probably the "cleanest water" one can drink would be water that is distilled into glass containers, but then one has to make sure to add electrolytes to the water so the water itself doesn't deplete you of salts and other minerals.