Green partyhat

Green partyhats come from opening Christmas crackers, which were obtained in the 2001 Christmas event. They are currently the third most expensive partyhat of the six. Its street price surpassed the price of Yellow Partyhats due to the release of Royal Crowns.

A green partyhat was also one of the most expensive items lost during the World 111 glitch, also known as the Falador Massacre.

Trivia

 * On the 8th of November, 2009, players discovered a way to temporarily duplicate partyhats (and presumably any item) by lending the item away then opening house options. This would return the item to the lender, while the receiver retained a copy. The receiver's copy would disappear immediately upon moving in any direction, and was therefore impossible to keep for any extended period of time unless the receiver does not move at all.
 * During the Falador Massacre on 6/6/06, the infamous bug abuser, Durial321, was seen wearing one of these, possibly looted from one of his victims.