Kelly kettles
 

Whilst having a quick thumb through an outdoorsy magazine today i came across this
Kelly Kettle Company - Volcano Kettle® for Car Camping,Survival Kits,Wilderness,Scouts,Disaster kits
...might be of interest to car/van travellers (a bit bulky for bikers?).

Fantastic piece of kit, we had a rule to get it out whenever we were stuck or broke down. Saves steaming into something without thinking about it.