Using the Jetboil Flash JavaKit is a breeze. First, fill the 1 - liter FluxRing cooking cup with water. You can use the bottom cup as a measuring cup if needed. Then, connect the stove and use the pushbutton igniter to start heating. Keep an eye on the thermochromatic heat indicator to know when the water is boiling. Once the water is ready, if you want to make coffee, take out the Silicone Coffee Press from inside the cooking vessel, add your coffee grounds, pour in the hot water, and let it steep. When it's time to press, gently push down on the press. As for carrying, since the whole kit weighs only 13.1 ounces, it's very easy to pack in your backpack. For maintenance, make sure to clean the cooking cup and the coffee press after each use. Let them dry completely before storing. And always store the stove in a cool, dry place. Don't forget to check the igniter regularly to ensure it's working properly. Also, when using the stove, make sure it's on a stable and non - flammable surface.