As McClish told it, the 34-year-old outdoors enthusiast from Boulder Creek, California, lost his bearings after beginning his hike the morning of 11 June. He had not informed anyone else of his plans, so it would not be until the afternoon of Thursday, 20 June, that the unkempt-looking hiker was found at the bottom of a remote canyon and rescued.
McClish spent much of the interim going up and down canyons, sitting by waterfalls and using his boot to collect water to drink and keep himself hydrated. He also sustained himself by collecting and eating berries, he said.
At one point, McClish said to KSBW, a mountain lion began following him – but the creature kept its distance and showed no interest in harming him. He said he would sleep on a bed of wet leaves, intermittently yell for help and think of what he would do to provide himself his next meal.
I’m thinking either he used it as a canteen to carry more water further, or as a rain barrel to capture it, not just as a cup to drink from at places where water was readily available.