How mineral water does differ from distilled water?

mineral water contains salts. Distilled water does not contain any salts, it's just water. And bottled water comes in a bottle. As a "food" item I expect it has to pass food safety standards, but otherwise it could be anything.

Mineral water is water that has had minerals dissolved into it as a result of being stored underground. Spring water is mineral water for example. Depending on where the mineral water has come from effects the mineral content of the water. Distilled water on the other hand has been distilled. That mean it has been turned into steam, then the steam is allowed to cool turning it back into water in a clean container. What happens as a result is that only the water turns into steam leaving the mineral content behind giving you pure water with no mineral content.