Nothing stops a determined silverfish...they are the Godzilla of the insect world! Trust me on this one....

:-)

If you read the article it has a coating on it which makes it water and fire resistant. This coating strengthens and protects the cardboard... from bugs as well.

I can see it now:

Your late for work (again), and your boss asks, "What is your excuse THIS time?"

You answer, "Silverfish...they ate my ride."

Very interesting and recycling is a good thing when there is economic as well as environmental benefit. One thing: Cardboard is biodegradable and is a renewable resource... I have never understood the supermarkets aversion to good old fashioned paper bags...