The Himalayas have their own mystery that refuses to fade. The Yeti isn’t just a campfire tale or a blurry photograph; it shows up in local traditions, religious stories, and even official reports.

According to recent earnings reports, drinkware under the Rambler series now makes up the majority of Yeti sales. Which is to say, it’s the brand’s shiny, new leakproof travel mug that could go down ...