This past May, mountaineer Melissa Arnot completed her fourth summit of Mount Everest – more than any other woman in history, at the young age of 29. If that wasn’t enough, she also summited Mount Rainier 91 times. She’s an inspiration to so many, and knows first-hand the importance of hydration for safety. No matter if you are climbing Everest or just training to climb the stairs, hydration is one of the single most important tools for ...