The pitch can is used to enhance line-style Firemaking. It is a potential reward from participating in Char's training cave. When lighting fires while carrying it, the fires light instantly, allowing for much faster Firemaking training. It also reduces the time between each log being added to a bonfire by 1 tick.
The can is obtained with 2000 charges, and each log burned consumes a charge. It can be refilled by participating in Char's training cave. Each shape completed grants 100 charges to the pitch can. It is tradeable when completely full or empty.