Quite funny to buy mineral water in bottles when it already comes out of our taps!
Don't get me going on the great mineral water con trick.
I don't buy still mineral water, always ask for tap water, unless in London where it tastes horriblewhen I get the cheapest sparkling bottled water available.
At home we have an ex-pub carbonator to make sparkling chilled tapwater. It is cheap.
Three final "professional" comments:
1. All EU tap water quality is very highly regulated, totally risk free. The only thing NOT regulated is taste!
2. Bottled water quality is far less regulated for quality and contamination, but generally tastes good.
3. "Natural Spring" water quality is virtually unregulated, especially if bottled in strange thrid world countries...