“The original basic Crusader BCB system cook set burner unit. Fits in your pouch base under the bottle. Matches to the original version Crusader steel BCB stalwart cup. Still very good kit to have. You can use solid fuel or fuel cooking gel like BCB Firedragon brands, or older style Esbit or modern-day versions of the Hexi cooking fuel blocks. Cup sits at top. You can brew up or fast cook meals fairly quickly in a sheltered location.”