Canning novelty. Early methods of manufacture employed poisonous lead solder for sealing the cans. Studies in the 1980s attributed the lead from the cans as a factor in the disastrous outcome of the 1845 Franklin expedition to chart and navigate the Northwest Passage. Later studies found this to be false. Increasing mechanization of the canning process, coupled with a huge increase in urban populations across Europe, resulted in a rising demand for canned food. A number of inventions and improvements followed, and by the 1860s smaller machine-made steel cans were possible, and the time to cook food in sealed cans had
Hobo stove constructed out of a variety of materials: paint cans, coffee cans, food tins, buckets, and large drums are most often put to that purpose. Further flexibility lies in the fact that nearly anything combustible can be used as a fuel source. Typical fuels are dry twigs and small pine cones. Use of animal dung is also possible. Use of a Buddy Burner allows a switch to use of such less-volatile liquid fuels as rubbing alcohol or kerosene or wax. Some types of cans may have interior coatings containing chemicals such as Bisphenol A. Reusing containers originally holding paints and other