The specialist china company J and S Chown in Cornwall has increased its original production run of 300 mugs - showing the Welsh and Union flags drooping and the Prince and Princess looking away from each other - to 2,200.
With the multi-million pound divorce due possibly within weeks, collectors worldwide are requesting the pounds 9.99 bone china memento.
"We didn't feel comfortable about doing it at first," said Wendy Chown, the company's sales director, but "It could do us some lovely business."
"Andy and Fergie Divorce" mugs are also planned. Miss Chown would not say whether the design featured toes.
The first royal mug was for Charles II's accession in 1660.