St. Paul’s Cathedral, a world-famous religious site, is the second largest dome church in the world. In "Tools" series, the gorgeous baroque church domes are all fitted with the most commonly used hand sanitizer bottle caps in contemporary life, thus transforming the entire cathedral into a hand sanitizer bottle, and the audience can press out hand sanitizer for cleaning. The western classical architectural culture is combined with every-day objects in the era of globalization, resolving the classic and the contemporary in a humorous way.