One good question to ask here is "Do you drink bottled water?" If the answer is yes, what kind of bottled water are you purchasing? There are three basic categories: Purified, Spring, and Drinking water. Purified water is usually prepared by Reverse Osmosis, De-Ionization, or both. Also Distillation can be considered as purified water also, but the label will frequently call the product Distilled Water. Spring water is water which is usually bottled from a mountain or artesian spring. Drinking water is usually tap water which has been processed. Spring water will generally have higher total dissolved solids than will Purified water. Purified water can be used for battery use, as well as steam irons because it is low in tds.