I eat significantly less when itīs hot and I need plenty of water. Eating just to get minerals isnīt too good. I experienced several situations were the loss of salt was an issue. Water from springs or tap water usually have some minerals in it without being called mineral water. Both can be essentially free.
Sometimes (maybe not in the US) water that was desalinated be other means is sold as "distilled water". As itīs not intended for drinking itīs technically clean but not neccessarily food grade. This may become an issue so checking canīt hurt.
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If it isnīt broken, it doesnīt have enough features yet.