We can switch transportation methods to something more sustainable. We don't have a method yet to deal with endless plastic waste. Microplastics and bioaccumulation along with most of the climate change impacts from plastic production anyways is worse.

Ideally just legislate that any bottled water producers actually recycle as many bottles as they use. Add recycling costs to the products if required, that'll show the true cost. People who need water can always rely on refillable jugs if this cost is justly high.