The snake knot is a nice base for a zipper pull, lanyard, key ring fob
the overhand, overhand stopper knot goes well with it and the ends can be trimmed close to the knot
Middle a short length of cord and bring one end under the other . . . . .
. . .and back over itself.
Flip the knot upside down
and bring the other end down under . . . .
. . . and back up through the first bight
repeat steps 1 - 6 two more times for a total of three snake knots
Tie an overhand knot a short distance above the snake knots
Tie a second overhand knot just below around the two strands
Bring the right hand strand up through the right hand bight of the first overhand knot
Bring the left hand strand down through the left hand bight
Tighten, the knot is complete