i asked my local culligan about that because i can refil the 5gal jugs with the reverse osmosis for $0.25 per gallon.
they said it still has the minerals in it.
the distilled (red cap here) is the most mineral free they have at 99.x percent mineral free
they said it still has the minerals in it.
the distilled (red cap here) is the most mineral free they have at 99.x percent mineral free