Invar Cubic Inch by Craighill
An extremely precise cubic inch. Made of Invar, the most dimensionally stable metal alloy in existence. It's a desk object, a measurement tool, and fun thing to absentmindedly fiddle around with while you're stuck on a conference call.
You can learn more about the development of this product and the history of Invar here.
1" x 1" x 1" Invar cube