What Do Instead
Since it’s already been proven that tap water is cleaner and cheaper than bottled water, there’s only one thing to do.
If you live in a place with good tap water, just have a stainless steel bottle and carry some with you. If you living in a place with less-than-good water, consider a filtration system. Or, do some research on which companies have safe plastic, no fluoride, and no other chemicals. They are out there.