It's very rare that we write about a product that adds complexity to the equation, but we'll make an exception for these Richard Mille Cufflinks ($20,000). Created over two years, they're made from grade 5 titanium, and feature a patented mechanism that opens the twin titanium bars using push-pieces and close by pressing on the top plate, resulting in cufflinks that contain 38 components each. Other features include satin-brushed upper surfaces that are bevelled by hand and a surprisingly subtle look.