I select mine on the basis of the blurb on the bottle. Take this compelling read, for example:
The Yorkshire Pennines – a backdrop of steep valleys and rolling hills scattered with mature oak trees – is one of Britain’s most scenic landscapes. Deep within these Pennine hills water slowly filters through a sandstone layer known as millstone grit. It can take up to 50 years for this process to create water with a unique combination of minerals. It’s this Natural Mineral Water that is Pennine Spring.