What Our Gearhead(R) Experts Are Saying:"This insulated reservoir is a game-changer for year-round adventures. I used it on a hot summer hike and loved how my water stayed cold all day. In winter, it keeps my water from freezing while skiing. The Crux design makes refilling easy, and it fits seamlessly into my pack."When we set out for adventures in any season, the Stoaway 2L Insulated Reservoir from CamelBak has our back. Its Thermal Control insulation turns any pack into a hydration powerhouse, keeping our water cool during summer treks and ice-free on chilly mountain outings. We appreciate the ergonomic Crux Reservoir, which delivers 20% more water per sip, letting us hydrate faster and keep moving.