Distilled water can have a horrible taste due to condensation impurities and metal contact.

“I have never discovered a distiller that I like the concept is great but I think that it's made better with reverse osmosis which i'll talk about in a moment but distillation as far as I tested it tastes funny because of the condensation probably impurities and the metal the stainless steel where the water is condensing so I threw out my distiller I hated the way that water tasted and believe me I did four to five I even did ten pots of distilled water and it just continued to taste horrible”