Take a length of your twine, and, leaving a tail at each end for tying, tape to each side of your mason jar.
Next, take your spool of twine and hot glue one end to your jar.
Wrap the twine around the rim of your jar. When you are happy with the result, cut the end of the twine and glue it down.
Lastly, tie each loose end of twine into a knot….
And you're done!
Easy, wasn't it?