We’ve already seen some innovative uses of iBeacon — for example, Major League Baseball uses it within its stadiums, while Apple uses iBeacon in its retail stores to alert customers about discounts on nearby items. But iBeacon is just getting started, and Gizmodo alerts us to one of the more interesting implementations of iBeacon from a company called Tzukuri. Tzukuri put a tiny (3 millimeter) iBeacon chip in its sunglasses to alert you when you’ve accidentally left them behind. When your sunglasses are more than 16 feet away from your phone, you’ll get an alert, and then again at 32 feet and 50 feet. If you venture farther than that, the Tzukuri app will keep track of the last location it had for your sunglasses.