Homemade Metal Can Air Heater DIY. no grid power needed (run on alcohol). delivers high temps. great for heating and cooking. use during SHTF/emergency, camping, hiking, hunting or even everyday use. made with only 3 items (metal can, alcohol and toilet paper). can easily be “converted” into a stove. cans used in the video were: progresso soup can, quart paint can and gallon paint can. fuel used: 70% isopropyl alcohol. cans used to “convert” the heater into a stove: del monte spaghetti sauce cans

source