He Takes A Lighter To This Key–Just In Case He Misplaces It!

All you need for this is:

• your original key
• a lighter
• a piece of tape
• the lid to a can
• a scissors

The procedure is shown in the video:

This is so cool!  be careful not to cut yourself on the edges of the can lid.  Those will be sharp.  Then keep that extra key in a safe place.  (Just don’t forget where you put it!)

Thanks davehax!