First of all there is nothing inherently unsafe in drinking distilled water. The lack of minerals may or may not affect an individual’s like or dislike of the taste.

As to bottled water, unless the company filters the water with a low micro sized filter (for bacteria/fungi and parasites, viruses are generally too small to be filtered) or treats the water with chemicals and/or UV to kill bacteria/fungi, parasites and viruses, it is likely to contain biological organisms. For the most part, unless there is organic material for which the bacteria/fungi to live on while being stored, they will die over time. Parasites, spore forming bacteria and some viruses may remain viable for long periods of time, although water stored in a closed vehicle, with high temperatures will tend to kill most of these organisms over time.

Pete