Originally designed so that downed pilots could survive inhospitable environments, Ãberfire is an excellent source of steady, intense heat. It is completely hydrophobid (meaning it will not absorb water) so even in wet environments, you're guaranteed to get a flame. Made of all-natural ingredients, a 2 oz. can will burn for approximately 20-30 minutes depending on conditions. It's designed to light from one spark, and will not evaporate after partial use so it can be used multiple times.