Buy OSRS Bottomless compost bucket
The bottomless compost bucket is a members only item in Old School RuneScape. It is a drop from the Hespori. It can hold compost, supercompost, or ultracompost, but only one type at a time.
This bucket doubles your compost. Each bucket of compost you add gives it two charges. It can hold up to 10,000 uses, which means it can be filled with up to 5,000 buckets at once. You can fill it from a compost bin or from noted or unnoted buckets of compost. If you use buckets, the empty buckets come back to you in the same form.
The compost inside can only be used on farming patches. It cannot be put back into empty buckets. If you use it only for ultracompost, the bucket pays for itself after fertilising 1,948 farming patches. Tool Leprechauns will store the bucket in its own slot, so it saves bank space too.
The bucket weighs 1 kg and has Fill, Check, and Drop options. It is tradeable only when empty, and you can empty it with a right-click option. It was released on 10 January 2019.