The Hydrolight Outdoor Gear Hydrolight 2L Reservoir Water Bladder Light does double duty. It’s both a water bladder and a camping light, making it a great addition to your camping setup. With a two-liter capacity, this outdoor lantern ensures you have enough water throughout the day. And it also makes sure you can see your way at night. Weighing just 6.5 ounces when empty, it won’t make hardly a dent in your backpack. Additionally, a great feature of this lantern is the warm glow it emits. Rather than creating a harsh spotlight like a flashlight does, this gadget produces a comforting, warm yellow glow that won’t detract from your gorgeous natural surroundings. Finally, it’s no problem if it’s extremely cold where you’re going, as this Hydrolight reservoir can handle temperatures from freezing to 140º Fahrenheit.