Here it is...in it's original state.
Saved from the recycling bin, to be transformed into something spectacular.
OK maybe not spectacular but it is pretty nice to look at.
Cut down the middle and flatten it out.
Roll into a cone with the top as close together as you can make it.
Staple or tape into place.
Trim around the base to make it flat, so it can stand and not wobble.
This can be tricky, not unlike cutting the legs of a table, but it works well enough to just eyeball it.