Created by artist Lydia Leith, the bags are available in either blue or red and carry an illustration of the happy couple on the front.
Underneath is written: “Royal Wedding Sick Bag: Keep this handy on April 29th 2011.”
The picture is topped with a crown and the pun: “Throne up.”
Lydia specialises in illustration, graphic design and screen print, selling posters and greeting cards from her website.
The sick bags are available to buy for three pounds each from lydialeith.com.
The royal nuptials will be taking place on 29 April at Westminster Abbey in London.