Mountaineers have a few options when it comes to stoves. They can use liquid-fuel stoves, such as the MSR Whisperlite International, or they can use gas stoves, such as the Jetboil Flash. Both of these types of stoves require some type of fuel to operate, but they have different features that make them better suited for different types of trips. For example, the MSR Whisperlite International is great for long trips where you're going to be using it for multiple days at a time, while the Jetboil Flash is better for shorter trips where you're only going to be using it for a few hours at a time.