It ought to be able to be removed by using your foot and standing on it
(don't break the box!). That's how I did it, anyhow. It applies enough
pressure to force the cone's plastic self-locking lips to give. It takes
some effort, but it worked fine for me.
-T
Zip-zap ... zip-zap ... it's Tom ... Tom Boyer ... cyng@lamere.net!
... who cares?