I some how managed to add a double cinch rope using some old red shoelaces I had. Don't ask me why I had red shoelaces, never have I had an occasion to wear them. Now they're forever a part of this wonderful bag and the boomwackers have been contained. Oh how I love when things find a home.
It would probably be pretty cool to add a shoulder strap in the future, like a yoga mat bag has, but that's a project for another day.