One of my bags that I got from the grocery store was falling apart. So I took it apart the rest of the way and used it for a pattern. I've been using these for 3 years. my husband had fun helping with this project. we had some acrylic sheets 1/4 in thick. Now he uses them. he keeps a couple behind his seat of his truck. Women have asked him where he got them. LOL and he just tells them he made them. Ok by me.