How much is inside a Sharpie?

For those not in the know, Sharpies are meant to be the best tool to use for labeling the CDs you burn. I do NOT want to get into an argument as to whether this is true or not, but I use them and they work ok for me. One question, that we now know the answer to is: How Much is Inside a Sharpie?

Some folks clearly have too much time on their hands!