The Swiss Army knife has been around for more than a century, and for all its utilitarian virtues, the trusty old Boy Scout standby was due for an upgrade. Hence the deluxe Bonfort edition. Coated in 18-karat yellow gold and studded with 72 eye-popping diamonds, this version of the 3-inch Classic model packs a tiny pair of scissors, a file with screwdriver tip, and an engraved knife blade that would please a Medici prince. Being Swiss, of course, functionality is still king. It remains the go-to gadget when you need to punch open a tin of Dinty Moore because the yacht didn’t come with a can opener.