The Hydrapak Flux 1L is a collapsible, compact, and lightweight water bottle that expands into a rigid shape but compresses back down to save pack space. It's an upgrade for flexible bottles, mimicking the shape of a hard bottle, compressing like a soft flask, and reducing weight by 50%. It features a dust cover and twist-drink nozzle for easy hydration, along with a bail handle for secure carrying. Standing upright like a hard bottle, it packs down to pocket size once empty, ensuring ultimate packability in bags or pockets.