Beware the curse of the TDS meter. Once you know the number, you can’t un-know it. You’ll judge water at every restaurant, friend’s house, and public fountain. You will become an insufferable water critic at dinner parties.
That said, it’s the most satisfying under -10-dollar purchase you’ll ever make. It confirms your gut feeling that the hotel ice tastes weird. It saves you from buying eight plastic water bottles when your tap is fine. And it gives you a tiny, nerdy superpower: seeing the invisible.
So go ahead. Buy one. Dip it in your life. Laugh at the high numbers, celebrate the low ones, and remember: water is just water. Unless it’s above 600 PPM, in which case it’s a soup you didn’t order.
