KEY BUOY key chain

The ultimate key fob for boaters! When keys fall in the water,
Key Buoy self-inflating key ring opens up, releasing an air tube
which inflates automatically. Within 30 seconds, your keys rise
to the surface, and the 14" (47 cm) inflated tube extends above
the water, allowing you to reach over and pick them up.

Strong enough for items weighing up to 2.8 ounces (80 grams)
such as keys, small tools, deck plate keys.