Well I wasn't off by much. It's only 6 hours later.
I think you're right Angela. I might try a little piece of wood. Maybe a wood chip from outside.
The pictures really don't do the bottle justice. I hope they don't discourage someone from trying this because it really is a fun project. It would look much much better if it had clear oil in it.
There are a bunch of bubbles in the oil. I'm not sure what's causing them.