In one of my first trips in Quetico in the early 70's, our fearless leader packed the Coleman fuel next to the pancake mix.  I think everyone knows where this is going.  The morning we had pancakes everyone noticed that the pancakes tasted really strange and after eating the pancakes, everyone was burping gas.  I personally had what felt like heartburn for a couple of days.  In hindsight never pack Coleman fuel anywhere near your food.