What is your project ?
Using it in a room HUMIDIFIER eliminates the scale from tap water.
Add the tiny tiny spoon of fertilizer on the end of most fertilizer measuring spoons, to water your plants without adding the minerals in the water. thus eliminating the need to re pot
Ironing, I iron just about every day! Here are other uses.
You it in a CPAP humidifier.
clean your coffee pot
Used in your steam iron.
use in your own DIY skincare formulas
I am on oxygen and I use distilled water in my machine.