With tighter and tighter fire restrictions in the West, and not yet converted to cold dinners, I’ve kept looking for ways to cook without fire, even considering electricity :-)
I stumbled upon Mealspec MRE heaters recently:
http://www.mealspec.com
basically a plastic bag with an “add water to generate heat” packet inside.
This packet can reach 220 F (104 C), runs for 12 minutes or more, and can literally hard-boil eggs and poach salmon if you believe the video reviews.
http://www.mealspec.com/reviews/
They weigh roughly 2.5 ounces (71 grams) each, cost less than $2 each, and have a claimed shelf life of five years.
http://www.campingsurvival.com/meflmrehe.html
Not exactly lightweight and cheap, but for short trips maybe much better than cold food.
Has anyone tried these for backpacking?
— Rex

