The Collapsible Volcano 2 combines a variety of cooking options with easy portability. As the name suggests, this Volcano model collapses down to 5â and is easily transported in the included storage bag. This stove can be used with charcoal or wood and is highly efficient. The Collapsible Volcano 2 utilizes a unique heating chamber that channels the heat upwards towards your food; reducing heat loss and increasing efficiency. This also means that the area surrounding the stove remains surprisingly cool, allowing you to cook with the stove on a variety of surfaces. Opening and closing the Collapsible Volcano 2 is very easy. In its closed position the unit is only 5â high x 15.5â diameter, by simply pulling up on the handle, the entire grill pops open to 10.5â high, the legs unfold, and you have a highly efficient, self-contained stove. To close the stove, (please wait until is cool to the touch to do so) simply lift up from the bottom, the stove retracts within itself and the legs fold under the body.