This includes a Cost Savings Calculator which lets you calculate how much you would save by switching from bottled water to filtered tap water.
Of course, you could save even more by just filling a bottle up straight from the tap!
But he also calculates the amount of carbon dioxide you would save by not buying a plastic bottle. His research shows that each 500 ml plastic bottle generates 82.8 g of CO2. And about 70% of these bottles end up in landfill or in the ocean, according to Eugen, although figures for UK might be different.
And he does not include the emissions generated by the distribution of the water.
In any case, he makes a strong case for NEVER buying bottled water.
Drinking Water Base website
Eugen Nikolajev‘s Facebook page