Have you seen this before?

Yesterday I had to clean out a storage building for work. A lady had donated a lot of craft stuff for the Art Center (that is where I work part-time) This is what I found. I :?? it is knitted, but not real sure. and if it is HOW is it done. I tried to do a Google on it but can’t find a pattern. Does any one know how it is done and if it is knitted?

Don’t know if I would make one, might if it is knitted. it looks real neat on how it is made. I know there is a piece of plastic running thought it.

I’m pretty sure it’s crocheted. And I think the things are from the plastic stuff that 6-packs of pop are put in. My mom used to make them.
Here is a pattern that describes how they are made.

Thanks Momto… That is kinded neat how that is done. Thanks for the post.