The main RuneScape Wiki has an article on: Pumpkin
The Old School RuneScape Wiki also has an article on Pumpkin.

The Pumpkin was the first holiday item dropped on 31 October 2001 during the 2001 Hallowe'en event. If eaten, they will heal 14 hits. They eventually were discontinued and are now considered quite rare and valuable.

Marketplace significance

Although the pumpkin is the oldest holiday item, others like the Party Hat, Santa Hat, and Halloween Mask are traded more often. This is most likely due to the fact that players cannot wear their Pumpkin and show off their wealth.

Consumable status

It is strongly recommended that a player banks their pumpkin, as it may accidentally be eaten. This precaution is extremely important because of the item's value and rarity. Other examples of consumable discontinued items are the Easter Egg and Half Full wine jug.

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