Actually, this website had the instructions to make both the soda-can fire, and the ice-lens fire, loooong before the myths were on Myth Busters.
And to be fair, i trust the people at wildwoodsurvival, more than the trials of MythBusters. They did try to make the lenses of ice, outside, in what appeared to be 60-70 degrees F.
And in a survival situation, where there is ice, it doesn`t melt as quickly as it did in that particular MythBusters episode.
Also, they did try the soda-can myth, and they did achieve some results, but in my opinion, they were too impatient. Actually, the MythBusters crew, could probably have learned a thing or two, by reading the wildwoodsurvival website.
Not saying it`s an optimal thing, or that it`s even possible in a survival situation, as i`ve never tried it myself. But to follow the logic in it, it seems that the toblerone works better than most chocolate, as it contains a few hard particles. (Nuts, honey and other stuff.) Which might help with polishing the can, more than other chocolates. But, again, i don`t know, since i`ve not tried it.
But my opinion, is that the toblerone is too good to use on a soda-can.
If in a survival situation, i`d rather eat the toblerone, and spend the extra energy i get from it, finding other ways to make fire.