These souvenir prophylactics take royal protection to a whole new level. Or so says London-based condom manufacturer Crown Jewels, which describes itself as "the proud purveyor of an exclusive range of heritage love sheaths." The firm sells the condoms in regal-looking purple boxes and pitches the product with a saucy marketing campaign. "Like a Royal Wedding, intercourse with a loved one is an unforgettable occasion," one slogan goes, while the website entreats customers to "lie back and think of England."