Doritos work really well too. I've tried other corn chips, but the Doritos shape is easy to ignite and burns at a slow, even rate.I'm not a huge fan of reheating coffee. It changes the taste. I'm not a coffee snob, so I'll still drink it.
It's an option. If there's not enough tinder to get it going, for example.
You probably won't have this in your truck, but petroleum jelly covered cotton balls are amazing.

