&gt;It&#x27;s fine for the first cup or two, but after that it starts to burn. Wash your hands with it and you&#x27;ll find you skin is dry and cracking.<p>I have handled and, against my better judgement, quaffed many types of deionised water: triple glass distilled, reverse osmosis, ion exchange, etc. They taste more or less the same to store-bought distilled water and I have not yet had any of the ailments in your complaint. There is also a certain coworker who developed a pechant for the MilliQ water machine and regularly filled her drink bottle with ultrapure (&gt;18.2 megaohms) water there. Suffice to say she is still doing it.<p>&gt;But really, get over it, 99% of the US has safe tap water<p>This is not necesarily true given the state of water infrastructure in the US. The water leaving a treatment plant is not the same as water coming out of a tap.