Small bottle of kerosene
In-game description

Lantern fuel is a container of kerosene fuel for the storm lantern. It can also be used as an accelerant for starting fires. One container of lantern fuel can hold a maximum of 0.5 liters.

Unlike the Jerry can, when the container is emptied, it is spontaneously removed from the player's inventory, and then generated when harvesting a storm lantern, or from cooking fish. Lantern fuel features the fictional brand name "Ever-flame," and the container lists the volume as "350 mL" or 0.35 L, while a full container of lamp fuel can actually hold up to 0.5 liters.

Curiously, the in-game description of lantern fuel will always describe lantern fuel as "small bottle of kerosene" even when a container is generated from cooking fish. Kerosene is actually a petroleum product and is created from the processing of crude oil.

Fire Starting
Starters Cardboard matchesFirestrikerMagnifying lensWood matches
Tinder Birch barkCat tail headTinder plugCashNewsprintNewsprint rollStack of papers
Fuel BookCedar firewoodCoalFir firewoodFirelogReclaimed woodStick
Accelerant AccelerantLantern fuel