Thermometer Cufflinks
Sure, having DJ turntables or pin-up girls on your cufflinks is cool, but if you want something a little more functional, check these out. The fully-working thermometer cufflinks by Tateossian London ($165) let you know the temperature at a glance without consulting the Weather Channel. They've got a black face and sport a shiny silver finish, with one cufflink in Celsius and the other in Fahrenheit.
