... I have used both Aquafina and Dasani for brewing Japanese teas with equal success ... I guess. Unfortunately I have only seen either in small plastic bottles.
But I can get Pura Vida in gallon jugs which is essentially the same.
I have not done a lot of experimenting outside of these. Someone recommended these for Japanese teas. The results are better than our well water which is harder than nails. So, any improvement is a plus.
Still it kills me to put more plastic into the environment!