This is the sweetest binary gadget I’ve ever seen, the binary wedding ring.
On the Binary rings, there are 5 parallel tracks running around the ring, each track representing a digit in the binary lexicon. The track is engraved for 1 and left blank for 0. In this way, the five lines of engraving which progress around the ring spell out, in combination, your personalized message. Whew! Got it?
The binary ring costs $950 from greenKarat (or $1750 for the platinum version), found with thanks on Everything and Nothing.