CBS News/ March 18, 2011, 1:51 PM

Oops! Wrong prince appears on royal wedding souvenir

"Will and Kate " mug from www.guandongenterprisesltd.com

(CBS) - Now, this may be a true collector's item. An unofficial souvenir mug brought out to commemorate the upcoming royal wedding has Kate Middleton marrying the wrong prince.

Tagged as a "beautiful cup to commemorate the most beautiful occasion," the decorative white keepsake features a photograph of a smiling Middleton next to Prince Harry, her soon-to-be brother-in-law, and not Prince William.

Pictures: Prince William and Kate Middleton
Special Section: Britain's royal wedding

The unusual souvenir is reportedly designed by Chinese firm Guandong Enerprises. It can be purchased for about $16, plus shipping and handling.

The company says on its website that the mug is "crafted in the finest bone china, it features an exquisite design of the happy couple with ornate gold detailing to honor this great moment in history."

"Please be our guests to own this esteemed, limited edition heirloom to celebrate with your work associates, friends, family and loved ones on 29th April 2011," the company adds. "You are welcome to purchase now to avoid disappointment and regret."