The company, which was granted a royal warrant in 2009, is to roll out the limited edition packs of the pepper sauce brand in may. A red, white and blue box, featuring diamond artwork, will house the bottle and will feature an onpack promotion for oue person to win a diamond worth £15,000 from william & son of london. To win, the person needs to find a white insert under the cap of one of the limited edition bottles. More than 500,000 of the limited edition packs are being made.