Shredded Plastic

I cut up plastic bags to make plarn (plastic yarn - fyi see more on this old blog post). There's only so much plarn I can use though. And, there are smaller bags that are not conducive to plarn, such as bags used to hold crackers inside the box, or raisin bags that are too sticky and a different texture than used for plarn. What to do? Well, I've started cutting the bags up and keeping them to use as stuffing for some outdoor pillows I'm making. I'm accumulating the shreds in an empty milk container so it's convenient to cut them up as they empty in the kitchen (I think of it as plastic composting). I know the shredded plastic won't be as soft as polyfil, but it's waterproof and that's what I need. I'm thinking it will take me a year or more to have enough for one pillow (they are big - I'm upcycling two empty 50 lb bag of pinto beans). We'll see!