Episode Notes We’re offering this episode to Slate Plus listeners as a special preview of our upcoming season of shows, which launches in June. Subscribe to Slate Plus to hear the full episode now. Decoder Ring is a podcast about cracking cultural mysteries. Every episode, host Willa Paskin takes on a cultural question, object, idea, or habit and speaks with experts, historians, and obsessives to try and figure out where it comes from, what it means, and why it matters. 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.