There are a few key items you need for every adventure, be it in the mountains, on the water, or driving across the country: a headlamp, snacks, and your trusty Hydro Flask 24oz Standard Mouth Water Bottle. Keep water icy cold for 24 hours out on your favorite sun-drenched crag, or have that early morning coffee last the entire drive into the backcountry before you head out on your skis. One bottle does it all.