Comment by jaggederest

I make my own mineral water - it's surprisingly straightforward. Make a concentrate of whatever you like, add a bit of it into a carbonation bottle, carbonate it, shake, refrigerate, and either consume sparkling or let it offgas.

You have to carbonate because (at least in my case) the amount of minerals per liter is too much for them to dissolve on their own, but they generally stay in suspension even when degassed