What is the source of distilled water? If you are calling permeate distilled water, it's not that pure, even though you can't measure any passage of sugar and other minerals, both are still in permeate in minute amounts. It will not last more than a month or 2, even if bottled at high temperatures, sorry.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.