purified water will work but not the best idea. It has usually has a high salt levels due to water softeners. Alot of people will say stay away from it. Distilled water is basically low salt content with some chlorine in it (nothing to be concerned about.) The best water would be reversed osmosis but Idk any where that sell that in bottles. It takes the chlorines out as well. So distilled is the best readily availible option unless you want to buy a reverse osmosis machine for like 300 bucks.