The Coke storage is part of the Blast furnace minigame. It is used to fuel the nearby stove. Players can use a spade on the coke storage to obtain a spadeful of coke, which can then be put in the stove. On official blast furnace worlds, dwarf Dumpy can take coke from the storage to the stove for hourly cost of 72k coins.
- In real-life, coke is an essential part of the steel-making process, providing a majority of the carbon content required to smelt iron into steel. The use of coke in the Blast Furnace may explain why it is so much more efficient than standard smelting, as coke is a highly refined version of coal.