The Optimus Crux folding stove is so lightweight and compact that you won’t even know you’re carrying or using a powerful 10,200 BTU burner. (Fuel canister sold separately.) Thanks to an innovative folding burner head and the convenient strap-on protective stuff bag, Optimus Crux packs down to store in the empty base of an 8 oz fuel canister. Quickly boil water, or simmer food without spot burning. Great for those who want a basic stove that takes very little space.