The fuel miser: It's freezing and the wind's howling—a perfect time to fire up the Reactor, which has a completely enclosed, windproof burner. The integrated pot/burner system puts the Reactor in a class by itself: It's compact, incredibly fuel-efficient, and boils a liter of water in a fast three minutes. An internal pressure regulator maintains consistent heat in cold temps or when the canister runs low. 1.3 lbs (includes 1.7-liter pot); msrgear.com
