Think expandable life preserver that lives on a wristband. Amanda Kooser:
The 4.9-ounce Kingii (pronounced “kin-gee”) is worn on the wrist. A lever triggers a carbon dioxide cartridge to inflate an orange, balloon-like float. The float pulls you back up to the surface of the water, whether you’re out surfing or taking a dip in a pool. Cartridges can be swapped out to make the wristband reusable.
It’s another IndieGoGo funded project. I wonder if I could get IndieGoGo to fund my dinner.