Ditto, these are the small packets you can pack inside your favorite cup (Snow Peak 700) with a box of matches/lighter and tinder; put it all in one place. Then just get a fire going and add water. As MAX indicates in the second post, bullion cubes are not exactly stable in warmer temps. But then if it's too warm for a bullion cube, hypothermia may not be an issue. If it's cool enough, carrying a bullion cube should not be a problem. This is one of those things that changes with the seasons.