Water from these distillers is more economical than bottled water. Durastill and Westbend distillers are also more convenient than bottled water. With water on demand there is no more running to the store and hauling bulky jugs of bottled water or running out of water at inopportune times. It depends on the vending machine. Unless you know what the vending water treatment is and how well the machine is maintained, you cannot always be assured of the quality of water.
Most home water is used for showers, baths, toilets, washing machines, and dishwashers.
It would be extremely expensive and wasteful to have this water undergo the same type of treatment as the water used for cooking and drinking. Although, some countries in the Middle East do use distillation as the form to purify their water. Even if a community could afford to treat all municipal water, it may still pick up some contaminants from the water distribution pipes and home copper and galvanized plumbing while being delivered to your home. On the other hand, quality distillers improve the taste and quality of water for drinking and cooking by removing contaminants closest to where you use it. Durastill and Westbend distillers do remove fluoride from your water.