So, here’s the casual truth: distilled water is the overachiever who removed everything from the guest list, and deionized water is the picky host who only kicked out the charged troublemakers. They’re both purified, but they had very different parties. Unless you’re a chemist, a car enthusiast, or a person who irons their underwear, you probably don’t need to buy either.
Stick with tap water that’s been filtered through a Brita. It’s the perfectly imperfect compromise—clean enough to taste good, but still full of the benign chaos we call “minerals.” And next time you see those two jugs at the store, you can nod with smug satisfaction. Ah, yes. The spa queen and the ninja. I know them. You’re welcome.