My Biology professor hates bottled water. He lectured about how bad bottled water is:
1) Often same as tap water but more expensive
2) Need energy (gas etc) to collect, make bottle, put in the bottle, ship to the store etc.
3) Waste from bottle and cap.
He thinks everyone should drink tap water. He said usually tap water in the US is fine and you can ask your city about your tap water.
I use Real Canadian spring water reason there have no sodium 0% that what I like to drink and also have filtered system in my house suit for cooking and drink..
Rest other water tap goes for shower and bath there's no filter..
Why need filter for shower?