plastic bottle to safety ring

This video show how to make safety ring form waste plastic bottle .Safety rings are a lifebelt, lifebuoy,, ring buoy, lifesaver, life donut or life preserver, also known as a “kisby ring“ , is a life saving buoy designed to be thrown to a person in the water, to provide buoyancy and prevent drowning. Some modern lifebuoys are fitted with one or more seawater-activated lights, to aid rescue at night. Items needs;- bottle thread pipe ( and 2m)