This 2-chamber, patent pending pressurized hydration engine creates a spray action to push water through to your mouth, making it that much easier to get water on the go. "Plug-and-play" adapters for the drinking tube and pressurization tube allow the engine to be easily removed from the pack for cleaning and refilling. Large slide top allows the engine to be easily cleaned, dried, and refilled. If handled with care, the engine can be turned inside out for cleaning and drying. Very convenient for loading your pack up with ice. Spray action pushes water through your Geigerrig In-Line Filter into your drinking tube so that you can fill up at streams, rivers, lakes, etc.