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Online auctioneer eBay says that bids for one of the wackiest pieces of royal wedding headgear have approached 18,400 pounds ($NZ38,000).
Princess Beatrice's massive ring-and-bow-shaped hat turned heads at the wedding of her cousin Prince William last month and has since become an Internet sensation.
The Philip Treacy creation has been compared to a toilet seat or a pretzel, and has been endlessly photoshopped to feature, for example, a cat crawling through it.
Beatrice has taken the joke in stride, featuring some of the most startling hat-inspired works on the eBay website. Money from the hat's sale is going to the UNICEF and Children in Crisis charities.
She said she hoped whoever bought the hat would have "as much fun with it as I have."
The auction ends on May 22.