I have the first generation of this Water container - main difference is the cap and the slider are not attached. That being said, this is a piece of gear that I literally take on every hike. It's lightweight, packs down small, and is almost bombproof. I find the 2L version to be the perfect size for me, as I also carry 2 1-liter smart water bottles. Throw in a Sawyer Squeeze and you have the perfect water filtration kit!