If liquid fuel sounds appealing, the ol’ standby is the MSR WhisperLite ($60). The Optimus Nova ($130) burns anything liquid, simmers well, and is exceptionally easy to use. But it’s costly.

Used and outdated white gas or Coleman fuel is considered a household hazardous waste. That means we can’t keep it, pour it out on the ground, toss it in the trash, or burn it in a brush pile ...