Anything packaged for the military comes with the added bonus of near-bomb-proof packaging, so even the "container" is too heavy for most of us. UB Rice packaging will probably be a little lighter.

Before I invested in Esbit tablets, I used military surplus trioxane bars. I have a big stash purchased cheaply from Sportsman's Guide. If you have any, try unwrapping a couple at home and weighing the packaging. The same level of heavy-duty foil+ is used for MREs. I'm not going to repackage an MRE, but I am considering packaging a few trioxane bars into a mylar snack bag right before weekend trips. (Trioxane is toxic, so be sure to wash your hands after handling them and use only in the open for good ventilation.)

CamperMom