To say that hydration is an invention is only a slight exaggeration. Back in the 1970’s and ‘80s, no one carried bottled water with them, but by the ‘90s it was a genuine status object. How did bottled water transform itself from a small, European luxury item to the single largest beverage category in America? It took both technological innovation, but even more importantly it took savvy marketing from brands like Gatorade and Perrier to turn the concept of hydration, and dehydration into problem they could solve via their wares. Today, hydration has branched out from athletics to wellness to skincare, but the actual science behind all of it is pretty sketchy. If you love the show and want to support us, consider joining Slate Plus. With Slate Plus you can binge the whole season of Decoder Ring right now, plus ad free podcasts, bonus episodes, and much more. Learn more about your ad choices. Visit megaphone.fm/adchoices